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18 Best C# Networking Libraries 2023

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by Dhiren Gala dot icon Updated: Mar 7, 2023

Guide Kit Guide Kit  

Here are some of the famous C# Networking Libraries. C# Networking Libraries use cases include Building a Chat Application, Building an Online Multiplayer Game, building a Networked File Sharing Application, building a Networked Database Application, and Building a Networked Streaming Media Application.  


C# networking libraries are the collection of classes and functions used to develop C# programming language network applications. These libraries provide functionality such as networking protocols, data transfer, encryption, and data storage. Examples of C# networking libraries include the .NET Framework Network Classes, System.Net, and OpenNETCF.  


Let us have a look at these libraries in detail below. 

mRemoteNG 

  • Supports many protocols such as RDP, VNC, SSH, Telnet, HTTP/HTTPS, and ICA/HDX. 
  • Rich plugin system to extend the functionality of the application. 
  • Powerful scripting engine to automate common tasks. 

mRemoteNGby mRemoteNG

C# doticonstar image 7513 doticonVersion:2023.03.03-v1.77.3-nbdoticon
License: Strong Copyleft (GPL-2.0)

mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.

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            mRemoteNGby mRemoteNG

            C# doticon star image 7513 doticonVersion:2023.03.03-v1.77.3-nbdoticon License: Strong Copyleft (GPL-2.0)

            mRemoteNG is the next generation of mRemote, open source, tabbed, multi-protocol, remote connections manager.
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                      websocket-sharp 

                      • Supports the latest websocket protocol specifications. 
                      • Supports compression of websocket frames using the Per-Message Deflate extension. 
                      • Actively maintained and regularly updated with new features and bug fixes. 
                      C# doticonstar image 5107 doticonVersion:Currentdoticon
                      License: Permissive (MIT)

                      A C# implementation of the WebSocket protocol client and server

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                                websocket-sharpby sta

                                C# doticon star image 5107 doticonVersion:Currentdoticon License: Permissive (MIT)

                                A C# implementation of the WebSocket protocol client and server
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                                          protobuf-net 

                                          • Serialization and Deserialization. 
                                          • Compact Binary Format. 
                                          • Supports Multiple Platforms. 

                                          protobuf-netby protobuf-net

                                          C# doticonstar image 4224 doticonVersion:Currentdoticon
                                          License: Others (Non-SPDX)

                                          Protocol Buffers library for idiomatic .NET

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                                                    protobuf-netby protobuf-net

                                                    C# doticon star image 4224 doticonVersion:Currentdoticon License: Others (Non-SPDX)

                                                    Protocol Buffers library for idiomatic .NET
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                                                              DotNetty 

                                                              • Event-driven API. 
                                                              • Protocol Agnostic. 
                                                              • Built-in Pipeline. 

                                                              DotNettyby Azure

                                                              C# doticonstar image 3847 doticonVersion:v0.4.0doticon
                                                              License: Others (Non-SPDX)

                                                              DotNetty project – a port of netty, event-driven asynchronous network application framework

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                                                                        DotNettyby Azure

                                                                        C# doticon star image 3847 doticonVersion:v0.4.0doticon License: Others (Non-SPDX)

                                                                        DotNetty project – a port of netty, event-driven asynchronous network application framework
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                                                                                  NETworkManager 

                                                                                  • Built-in packet inspection tool that can be used to troubleshoot and diagnose network problems.  
                                                                                  • Powerful tools for developers, such as a network traffic simulator. 
                                                                                  • Allows users to configure, monitor, and control their network traffic quickly. 

                                                                                  NETworkManagerby BornToBeRoot

                                                                                  C# doticonstar image 3659 doticonVersion:2023.5.21.0doticon
                                                                                  License: Strong Copyleft (GPL-3.0)

                                                                                  A powerful tool for managing networks and troubleshoot network problems!

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                                                                                            NETworkManagerby BornToBeRoot

                                                                                            C# doticon star image 3659 doticonVersion:2023.5.21.0doticon License: Strong Copyleft (GPL-3.0)

                                                                                            A powerful tool for managing networks and troubleshoot network problems!
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                                                                                                      Mirror 

                                                                                                      • High-performance, extensible, and lightweight. 
                                                                                                      • Designed to be platform-agnostic. 
                                                                                                      • Supports Unity’s built-in Networking. 

                                                                                                      Mirrorby vis2k

                                                                                                      C# doticonstar image 3211 doticonVersion:v67.0.3doticon
                                                                                                      License: Permissive (MIT)

                                                                                                      #1 Open Source Unity Networking Library

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                                                                                                                Mirrorby vis2k

                                                                                                                C# doticon star image 3211 doticonVersion:v67.0.3doticon License: Permissive (MIT)

                                                                                                                #1 Open Source Unity Networking Library
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                                                                                                                          surging 

                                                                                                                          • High-performance TCP/IP networking stack. 
                                                                                                                          • Pluggable architecture that allows developers to easily customize and extend the library to meet their specific needs. 
                                                                                                                          • Provides a range of built-in security features. 

                                                                                                                          surgingby fanliang11

                                                                                                                          C# doticonstar image 3189 doticonVersion:1.0.0doticon
                                                                                                                          License: Permissive (MIT)

                                                                                                                          Surging is a micro-service engine that provides a lightweight, high-performance, modular RPC request pipeline. support Event-based Asynchronous Pattern and reactive programming ,The service engine supports http, TCP, WS,Grpc, Thrift,Mqtt, UDP, and DNS protocols. It uses ZooKeeper and Consul as a registry, and integrates it. Hash, random, polling, Fair Polling as a load balancing algorithm, built-in service governance to ensure reliable RPC communication, the engine contains Diagnostic, link tracking for protocol and middleware calls, and integration SkyWalking Distributed APM

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                                                                                                                                    surgingby fanliang11

                                                                                                                                    C# doticon star image 3189 doticonVersion:1.0.0doticon License: Permissive (MIT)

                                                                                                                                    Surging is a micro-service engine that provides a lightweight, high-performance, modular RPC request pipeline. support Event-based Asynchronous Pattern and reactive programming ,The service engine supports http, TCP, WS,Grpc, Thrift,Mqtt, UDP, and DNS protocols. It uses ZooKeeper and Consul as a registry, and integrates it. Hash, random, polling, Fair Polling as a load balancing algorithm, built-in service governance to ensure reliable RPC communication, the engine contains Diagnostic, link tracking for protocol and middleware calls, and integration SkyWalking Distributed APM
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                                                                                                                                              BruteShark 

                                                                                                                                              • Supports many protocols such as HTTP, FTP, SMTP, DNS, and SSL/TLS.  
                                                                                                                                              • Integrated packet capture engine to capture network traffic and save it in various formats.  
                                                                                                                                              • Monitor multiple networks simultaneously and can detect MITM attacks. 

                                                                                                                                              BruteSharkby odedshimon

                                                                                                                                              C# doticonstar image 2654 doticonVersion:v1.2.5doticon
                                                                                                                                              License: Strong Copyleft (GPL-3.0)

                                                                                                                                              Network Analysis Tool

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                                                                                                                                                        BruteSharkby odedshimon

                                                                                                                                                        C# doticon star image 2654 doticonVersion:v1.2.5doticon License: Strong Copyleft (GPL-3.0)

                                                                                                                                                        Network Analysis Tool
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                                                                                                                                                                  LiteNetLib 

                                                                                                                                                                  • Supports both client-server and peer-to-peer architectures. 
                                                                                                                                                                  • Provides reliable UDP messaging with the help of its own packet fragmentation and reassembly mechanism.  
                                                                                                                                                                  • Supports automatic NAT punchthrough for connecting to peers behind a firewall or router. 

                                                                                                                                                                  LiteNetLibby RevenantX

                                                                                                                                                                  C# doticonstar image 2627 doticonVersion:v1.1.0doticon
                                                                                                                                                                  License: Permissive (MIT)

                                                                                                                                                                  Lite reliable UDP library for Mono and .NET

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                                                                                                                                                                            LiteNetLibby RevenantX

                                                                                                                                                                            C# doticon star image 2627 doticonVersion:v1.1.0doticon License: Permissive (MIT)

                                                                                                                                                                            Lite reliable UDP library for Mono and .NET
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                                                                                                                                                                                      MQTTnet 

                                                                                                                                                                                      • Supports SSL/TLS encryption and authentication. 
                                                                                                                                                                                      • Provides native support for Windows, Linux, and macOS platforms. 
                                                                                                                                                                                      • Includes an integrated logging framework. 

                                                                                                                                                                                      MQTTnetby chkr1011

                                                                                                                                                                                      C# doticonstar image 2473 doticonVersion:v4.0.0-preview1doticon
                                                                                                                                                                                      License: Permissive (MIT)

                                                                                                                                                                                      MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from http://mqtt.org/.

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                                                                                                                                                                                                MQTTnetby chkr1011

                                                                                                                                                                                                C# doticon star image 2473 doticonVersion:v4.0.0-preview1doticon License: Permissive (MIT)

                                                                                                                                                                                                MQTTnet is a high performance .NET library for MQTT based communication. It provides a MQTT client and a MQTT server (broker). The implementation is based on the documentation from http://mqtt.org/.
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                                                                                                                                                                                                          LOIC 

                                                                                                                                                                                                          • Allows the user to select from a variety of attack types. 
                                                                                                                                                                                                          • Includes a graphical user interface. 
                                                                                                                                                                                                          • Includes a feature called “Hive Mind”, which allows users to join a “hive” and send requests in unison with other users. 

                                                                                                                                                                                                          LOICby NewEraCracker

                                                                                                                                                                                                          C# doticonstar image 2274 doticonVersion:2.9.9.99doticon
                                                                                                                                                                                                          License: Others (Non-SPDX)

                                                                                                                                                                                                          Low Orbit Ion Cannon - An open source network stress tool, written in C#. Based on Praetox's LOIC project. USE ON YOUR OWN RISK. WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.

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                                                                                                                                                                                                                    LOICby NewEraCracker

                                                                                                                                                                                                                    C# doticon star image 2274 doticonVersion:2.9.9.99doticon License: Others (Non-SPDX)

                                                                                                                                                                                                                    Low Orbit Ion Cannon - An open source network stress tool, written in C#. Based on Praetox's LOIC project. USE ON YOUR OWN RISK. WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES.
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                                                                                                                                                                                                                              SteamKit 

                                                                                                                                                                                                                              • Support for various languages, including C#, C++, and JavaScript. 
                                                                                                                                                                                                                              • Highly extensible and can be used to create custom network protocols for games.  
                                                                                                                                                                                                                              • Various functions are designed to facilitate communication between applications and the Steam network. 

                                                                                                                                                                                                                              SteamKitby SteamRE

                                                                                                                                                                                                                              C# doticonstar image 2234 doticonVersion:2.5.0-Beta.1doticon
                                                                                                                                                                                                                              License: Weak Copyleft (LGPL-2.1)

                                                                                                                                                                                                                              SteamKit2 is a .NET library designed to interoperate with Valve's Steam network. It aims to provide a simple, yet extensible, interface to perform various actions on the network.

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                                                                                                                                                                                                                                        SteamKitby SteamRE

                                                                                                                                                                                                                                        C# doticon star image 2234 doticonVersion:2.5.0-Beta.1doticon License: Weak Copyleft (LGPL-2.1)

                                                                                                                                                                                                                                        SteamKit2 is a .NET library designed to interoperate with Valve's Steam network. It aims to provide a simple, yet extensible, interface to perform various actions on the network.
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                                                                                                                                                                                                                                                  NetCoreServer 

                                                                                                                                                                                                                                                  • Flexible API. 
                                                                                                                                                                                                                                                  • Robust Security.
                                                                                                                                                                                                                                                  • Cross-Platform Compatibility. 


                                                                                                                                                                                                                                                  NetCoreServerby chronoxor

                                                                                                                                                                                                                                                  C# doticonstar image 2017 doticonVersion:7.0.0doticon
                                                                                                                                                                                                                                                  License: Permissive (MIT)

                                                                                                                                                                                                                                                  Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution

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                                                                                                                                                                                                                                                            NetCoreServerby chronoxor

                                                                                                                                                                                                                                                            C# doticon star image 2017 doticonVersion:7.0.0doticon License: Permissive (MIT)

                                                                                                                                                                                                                                                            Ultra fast and low latency asynchronous socket server & client C# .NET Core library with support TCP, SSL, UDP, HTTP, HTTPS, WebSocket protocols and 10K connections problem solution
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                                                                                                                                                                                                                                                                      DotNetOpenAuth 

                                                                                                                                                                                                                                                                      • Provides strong cryptography algorithms and secure communications protocols. 
                                                                                                                                                                                                                                                                      • Written in C#, it is easy to port to other platforms.  
                                                                                                                                                                                                                                                                      • Allows developers to extend the library for their specific use cases. 

                                                                                                                                                                                                                                                                      DotNetOpenAuthby DotNetOpenAuth

                                                                                                                                                                                                                                                                      C# doticonstar image 1713 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                      License: Others (Non-SPDX)

                                                                                                                                                                                                                                                                      A C# implementation of the OpenID, OAuth protocols

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                                                                                                                                                                                                                                                                                DotNetOpenAuthby DotNetOpenAuth

                                                                                                                                                                                                                                                                                C# doticon star image 1713 doticonVersion:Currentdoticon License: Others (Non-SPDX)

                                                                                                                                                                                                                                                                                A C# implementation of the OpenID, OAuth protocols
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                                                                                                                                                                                                                                                                                          lidgren-network-gen3 

                                                                                                                                                                                                                                                                                          • Binary Serialization. 
                                                                                                                                                                                                                                                                                          • Peer-to-peer Networking. 
                                                                                                                                                                                                                                                                                          • Reliability. 
                                                                                                                                                                                                                                                                                          C# doticonstar image 1136 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                          License: Permissive (MIT)

                                                                                                                                                                                                                                                                                          Lidgren Network Library

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                                                                                                                                                                                                                                                                                                    lidgren-network-gen3by lidgren

                                                                                                                                                                                                                                                                                                    C# doticon star image 1136 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                                                                                                                                                    Lidgren Network Library
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                                                                                                                                                                                                                                                                                                              BeetleX 

                                                                                                                                                                                                                                                                                                              • Built-in support for Cross-Origin Resource Sharing (CORS). 
                                                                                                                                                                                                                                                                                                              • Deep integration with the .Net Core platform. 
                                                                                                                                                                                                                                                                                                              • Provides an asynchronous, non-blocking programming model with no callbacks and no threads. 

                                                                                                                                                                                                                                                                                                              BeetleXby beetlex-io

                                                                                                                                                                                                                                                                                                              C# doticonstar image 1085 doticonVersion:1.8.1doticon
                                                                                                                                                                                                                                                                                                              License: Permissive (Apache-2.0)

                                                                                                                                                                                                                                                                                                              high performance dotnet core socket tcp communication components, support TLS, HTTP, HTTPS, WebSocket, RPC, Redis protocols, custom protocols and 1M connections problem solution

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                                                                                                                                                                                                                                                                                                                        BeetleXby beetlex-io

                                                                                                                                                                                                                                                                                                                        C# doticon star image 1085 doticonVersion:1.8.1doticon License: Permissive (Apache-2.0)

                                                                                                                                                                                                                                                                                                                        high performance dotnet core socket tcp communication components, support TLS, HTTP, HTTPS, WebSocket, RPC, Redis protocols, custom protocols and 1M connections problem solution
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                                                                                                                                                                                                                                                                                                                                  BedrockFramework 

                                                                                                                                                                                                                                                                                                                                  • Provides a distributed object model that allows for objects to be shared across different instances without creating extra copies.  
                                                                                                                                                                                                                                                                                                                                  • Provides a unique set of tools for debugging and monitoring network traffic and performance. 
                                                                                                                                                                                                                                                                                                                                  • Allows for a more robust and reliable system than other libraries written in other languages.   

                                                                                                                                                                                                                                                                                                                                  BedrockFrameworkby davidfowl

                                                                                                                                                                                                                                                                                                                                  C# doticonstar image 725 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                                                                                                  License: Permissive (MIT)

                                                                                                                                                                                                                                                                                                                                  High performance, low level networking APIs for building custom servers and clients.

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                                                                                                                                                                                                                                                                                                                                            BedrockFrameworkby davidfowl

                                                                                                                                                                                                                                                                                                                                            C# doticon star image 725 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                                                                                                                                                                                            High performance, low level networking APIs for building custom servers and clients.
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                                                                                                                                                                                                                                                                                                                                                      EvilFOCA 

                                                                                                                                                                                                                                                                                                                                                      • Spoofing allows users to hide their IP address when making network requests.   
                                                                                                                                                                                                                                                                                                                                                      • The port scanning feature allows users to scan for open ports on a network.  
                                                                                                                                                                                                                                                                                                                                                      • The mapping feature allows users to map a network and identify various devices, services, and connections. 

                                                                                                                                                                                                                                                                                                                                                      EvilFOCAby ElevenPaths

                                                                                                                                                                                                                                                                                                                                                      C# doticonstar image 705 doticonVersion:0.1.4.0doticon
                                                                                                                                                                                                                                                                                                                                                      License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                                                                                                                                                                      Tool to analyze and test security in IPv4 and IPv6 data networks

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                                                                                                                                                                                                                                                                                                                                                                EvilFOCAby ElevenPaths

                                                                                                                                                                                                                                                                                                                                                                C# doticon star image 705 doticonVersion:0.1.4.0doticon License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                                                                                                                                                                                Tool to analyze and test security in IPv4 and IPv6 data networks
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