MessagePack-CSharp | Extremely Fast MessagePack Serializer for C # ( .NET , .NET Core | Serialization library

This library is distributed via NuGet. Special Unity support is available, too. We target .NET Standard 2.0 with special optimizations for .NET Core 2.1+, making it compatible with most reasonably recent .NET runtimes such as Core 2.0 and later, Framework 4.6.1 and later, Mono 5.4 and later and Unity 2018.3 and later. The library code is pure C# (with Just-In-Time IL code generation on some platforms).
Define the struct or class to be serialized and annotate it with a [MessagePackObject] attribute. Annotate members whose values should be serialized (fields as well as properties) with [Key] attributes. Call MessagePackSerializer.Serialize<T>/Deserialize<T> to serialize/deserialize your object instance. You can use the ConvertToJson method to get a human readable representation of any MessagePack binary blob. By default, a MessagePackObject annotation is required. This can be made optional; see the Object Serialization section and the Formatter Resolver section for details.
See our contributor's guide.