Enumeration extension methods

Question

In vs2008, is it possible to write an extension methods which would apply to any enumeration.

I know you can write extension methods against a specific enumeration,

Answer 1

Sometimes there is a need to convert from one enum to another, based on the name or value of the enum. Here is how it can be done nicely with extension methods:

enum Enum1 { One = 1, Two = 2, Three = 3 };
enum Enum2 { Due = 2, Uno = 1 };
enum Enum3 { Two, One };

Enum2 e2 = Enum1.One.ConvertByValue();
Enum3 e3 = Enum1.One.ConvertByName();
Enum3 x2 = Enum1.Three.ConvertByValue();

public static class EnumConversionExtensions
{
    public static T ConvertByName(this Enum value)
    {
        return (T)Enum.Parse(typeof(T), Enum.GetName(value.GetType(), value));
    }

    public static T ConvertByValue(this Enum value)
    {
        return (T)((dynamic)((int)((object)value)));
    }
}