using System;

​

enum SignedEnum : int

{

    A,

    B

}

​

enum UnsignedEnum : uint

{

    A,

    B

}

public class Program

{

    public static void Main()

    {

        uint x = 0;

        object o = x;

        var unsignedEnum = (UnsignedEnum)o;

        var signedEnum = (SignedEnum)o;

        Console.WriteLine("{0} {1}", unsignedEnum, signedEnum);

    }

}