How can I duplicate the F# discriminated union type in C#?

Question

I\'ve created a new class called Actor which processes messages passed to it. The problem I am running into is figuring out what is the most elegant way to pass related but

Answer 1

If you have this

type internal Either<'a, 'b> =
  | Left of 'a
  | Right of 'b

in F#, then the C# equivalent of the CLR generated for class Either<'a, 'b> has inner types like

internal  class _Left : Either
{
     internal readonly a left1;
     internal _Left(a left1);
}

each with a tag, a getter and a factory method

internal const  int tag_Left = 0;
internal static  Either Left(a Left1);
internal a Left1 {  get; }

plus a discriminator

internal int  Tag { get; }

and a raft of methods to implement interfaces IStructuralEquatable, IComparable, IStructuralComparable