Question

I have situation to extend the Enumerable class in c# to add the new Range method that accepts long parameters. I cannot define the method like this

public static IEnumerable<long> Range(this Enumerable source, long start, long length)
{
    for (long i = start; i < length; i++)
    {
        yield return i;
    }
}

Since extension methods are accesible only through its objects. And it gives me an error

‘System.Linq.Enumerable’: static types
cannot be used as parameters

Can someonce clarify me how to do this

Note: I know we can easily solve this without extension methods, but i needed this Enumrable class.

Answer 1

You (like me) are looking for static extension methods:

http://madprops.org/blog/static-extension-methods/

It’s not possible in C#. The closest alternative is to define another static class with a similar name (LongEnumerable?) and add your static method to that.