8 best C# Automation libraries in 2025

C# is one of the most popular programming languages in the entire world and boasts a massive ecosystem of libraries and frameworks. It's also one of the best languages to use for testing automation projects, owing to its ability to interact with all kinds of different software and systems (including Windows applications). We can use automation libraries that allow us to perform repetitive tasks automatically. Some of the most widely used C# Automation open source libraries among developers include: Cake - Cake (C# Make) is a build automation system with a C# DSL to do things like compiling code, copy files/folders, running unit tests, compress files and build NuGet packages; FlubuCore - cross platform build and deployment automation system. You can define your build and deployment scripts in C# using an intuitive fluent interface. The entire list of C# Automation open source libraries are provided below.