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

Another example of making Enum extension - but this time it returns the input enum type.

public static IEnumerable toElementsCollection(this T value) where T : struct, IConvertible
    {
        if (typeof(T).IsEnum == false) throw new Exception("typeof(T).IsEnum == false");

        return Enum.GetValues(typeof(T)).Cast();
    }

Example of usage:

public enum TestEnum { A,B,C };

TestEnum.A.toElementsCollection();