Welcome to the Lounge

OriginalGriff wrote:

If the class is your own, then it's just silly to use extension methods

public static class Extensions
{
    public static int Count<T>(this IEnumerable<T> collection)
    {
        int count = 0;
        using (var enumerator = collection.GetEnumerator())
        {
            while (enumerator.MoveNext())
            {
                count += 1;
            }
        }
        return count;
    }
}

Sander Rossel wrote:

On a few occasions I've created an interface, ISomething, and before writing any implementation I wrote a few extension methods I knew I needed.

To alcohol! The cause of, and solution to, all of life's problems - Homer Simpson

public interface ISomething
{
    IEnumerable<object> Stuff { get; }
}

public static class SomethingExtensions
{
    public static bool HasStuff(this ISomething something)
    {
        return something.Stuff.Any();
    }
}

public static bool Yes<T>(this T foo) {return true;}

Marc Clifton wrote:

public static bool Yes<T>(this T foo) {return true;}