Unity (Game Engine) support

[mgood7123]

does this support Unity ?

# current packages for working C# api in unity

Microsoft.CodeAnalysis.Common.4.9.0-2.final
Microsoft.CodeAnalysis.CSharp.4.9.0-2.final
Microsoft.CodeAnalysis.CSharp.Scripting.4.9.0-2.final
Microsoft.CodeAnalysis.Scripting.Common.4.9.0-2.final
System.Buffers.4.5.1
System.Collections.Immutable.7.0.0
System.Memory.4.5.5
System.Numerics.Vectors.4.5.0
System.Reflection.Metadata.7.0.0
System.Runtime.CompilerServices.Unsafe.6.0.0
System.Runtime.Loader.4.0.0

Mono runtime

netstandard2.0