How to use nested Result<> functions?

How can I get the Result<> exception (if is there one?)

What I’m trying to do is this:

private Result<string> GetMyString()
{
    ...
}

public Result<string> MyMethod()
{
   var strResult = GetMyString();
   if (!strResult.IsSuccess)
      return new Result<string>(strResult.GetException()); // <-- ???

   // other things that can return a string or an exception
}

Am I missing something?

And if the only correct way is to use just the Match() method, how should I do? because this doesn’t work

public Result<string> MyMethod()
{
   var strResult = GetMyString();
   return strResult.Match<Result<string>(
      x=> 
      {
          if(something)
              return x;
          else
              return new Result<string>(new Exception("error message"));
      },
      ex => new Result<string>(ex)
   );
}

[louthy]

Check the reference for ‘alternative value monads’ and the a subsection on Fin<A>

[louthy]

You’re free to create your own type called Final