How can I implement NotOfType in LINQ that has a nice calling syntax?

Question

I\'m trying to come up with an implementation for NotOfType, which has a readable call syntax. NotOfType should be the complement to OfType&l

Answer 1

If you're going to make a method for inference, you want to infer all the way. That requires an example of each type:

public static class ExtMethods
{
    public static IEnumerable NotOfType(this IEnumerable source)
    {
        return source.Where(t => !(t is U));
    }
      // helper method for type inference by example
    public static IEnumerable NotOfSameType(
      this IEnumerable source,
      U example)
    {
        return source.NotOfType();
    }
}

called by

List items = new List() { 1, 1.0m, 1.0 };
IEnumerable result = items.NotOfSameType(2);