This is a use-at-your-own-risk fork of the Protocol Buffers C# implementation for .NET 3.5 framework compatibility. The project builds the Google.Protobuf.dll library. It is based on the v3.1.x branch from the official project from Google.
You can either build the project yourself using Visual Studio/MSBuild, or you can download the package from Nuget. To get the package from Nuget, perform the following Nuget command:
Install-Package protobuf3 -Pre