Awesome
World.NET - A C# wrapper for WORLD vocoder
The binary distributions provided at release page targets .NET Framework 4.7, although the source code can be recompiled for lower framework versions with an explicit reference to System.ValueTuple assembly.
Please refer to the original repo in C by mmorise for a detailed description of the WORLD vocoder.
Please refer to file Tests/Program.cs for example usage of this library.