Functional Result in C#

Result.cs

using System;
using System.Runtime.InteropServices.ComTypes;

namespace Result
{

    public static class Result
    {
        public static Result<T,TError> Ok<T,TError>(T value)
        {
            return new Result<T,TError>(value);
        }

        public static Result<T,TError> Error<T,TError>(TError error)
        {
            return new Result<T,TError>(error);
        }

        public static Result<T2,TError> Bind<T, TError,T2>(this Result<T,TError> result, Func<T,T2> apply)
        {
            if (result.HasValue)
            {
                return Ok<T2,TError>(apply(result.Value));
            }

            return Error<T2,TError>(result.Error);
        }

        public static Result<T2,TError> MapError<T, TError,T2>(this Result<T, TError> result, Func<TError, T2> apply)
        {
            if (result.HasError)
            {
                return Ok<T2, TError>(apply(result.Error));
            }

            return null;

        }
    }

    public class Result<TSuccess,TError>
    {
        public bool HasValue => Value != null;
        public TSuccess Value {get;}
        public TError Error{get;}
        public bool HasError => Error != null;

        internal Result(TSuccess success)
        {
            Value = success;
        }

        internal Result(TError error)
        {
            Error = error;
        }


      
    }
}