How does OfType() Work?

Question

How does OfType() Work?

I read this link about what\'s going on but how exactly does the LINQ provider know how to get all objects matching the specified type. I kno

Answer 1

Your current implementation -- by design -- doesn't support value-types.

If you wanted something closer to LINQ's OfType method, that supports all types, then try this:

public IEnumerable OfType(IEnumerable source)
{
    foreach (object item in source)
    {
        if (item is TResult)
            yield return (TResult)item;
    }
}