Consider methods like List<T>.Sort(). They have several overloads only one of which accepts a delegate. However, when there is a call
someList.Sort(delegate(){}) and the anonymous method fails to have the correct signature a "cannot resolve: multiple candidates" error is shown on the Sort method. Very inconvenient.
Expected behavior. It makes sense to pick up the List<T>.Sort() signature that has a delegate parameter and show errors about incorrect signature or cannot cast return value in the anonymous method.