C# can not find FSharpType.IsRecord in .NET Core

[pocketberserker]

Some FSharpType and FSharpValue methods are defined by F# Type Extensions.
However, C# can not access F# Type Extensions.
And Some methods are not defined in .NET Core( https://github.com/fsharp/fsharp/blob/4.1.0.0/src/fsharp/FSharp.Core/reflect.fsi#L266 ).

Repro steps

1. dotnet new classlib -lang C# and add <PackageReference Include="FSharp.Core" Version="4.1.0" />.

2. Call Microsoft.FSharp.Reflection.FSharpType.IsRecoed

Expected behavior

Build succeeded.

Actual behavior

error CS0117: 'FSharpType' does not contain a definition for 'IsRecord'

Related information

sample project: https://github.com/pocketberserker/FSharpNETCoreSandbox/tree/2fdd6fa60cb3989458f96e77a0265064593e9ae7

[dsyme]

@pocketberserker Per CONTIRUBITING.md this should be added as an issue to http://github.com/Microsoft/visualfsharp please. Thanks!

It is unfortunate that C# can't call the methods in FSharpReflectionExtensions just because of the compile names containing a .. This is definitely something we need to fix as it is important for core C# libraries to be able to do this. As a workaround you could call them via reflection I believe?

[pocketberserker]

@dsyme ok. I'll do that.

I try to use reflection and build succeeded. https://github.com/pocketberserker/FSharpNETCoreSandbox/blob/443c35362cbdd167e59ffea03c535fbc251b212e/CsNETCore/Sandbox.cs#L11
Thank you!

[pocketberserker]

closing to move to visualfsharp repository