using System;

var test = 0.ToEnum<Test>();

var test2 = 1.ToEnum<Test2>();

​

Console.WriteLine($"Type:{test.GetType()} Value:{test}");

Console.WriteLine($"Type:{test2.GetType()} Value:{test2}");

​

test = Test.Second;

test2 = (Test2)0;

​

// ------------------------

​

public enum Test

{

    First,

    Second

}

​

public enum Test2

{

    One,

    Two

}

​

public static class TestExtensions

{

    public static T ToEnum<T>(this int value) where T : struct, IConvertible

    {

        if (!typeof(T).IsEnum) throw new ArgumentException("T must be an enumerated type");

        return (T)Enum.ToObject(typeof(T), value);

    }

}