Scharps.Either
Either is a light result library to distinguish between errors and successful results without the use of exceptions.
Usage
Result<Error> failedResult = CouldFail();
Result<Error, string> successfulResult = SuccessfulResult();
if (successfulResult.Value is string s)
{
System.Console.WriteLine(s);
}
else if (successfulResult.Error is IError e)
{
System.Console.WriteLine(e.Message);
}