Before:

public class Test
{
	public static void Do()
	{
		DictionaryEvents<string, string> dict = new DictionaryEvents<string, string>();
		CollectionEvents<string> coll = new CollectionEvents<string>();

		dict.BeforeAddRemove += delegate { throw new InvalidOperationException(string.Format("Whoops!")); };
		coll.BeforeAddRemove += delegate { throw new InvalidOperationException(string.Format("Whoops!")); };
	}
}

After introducing from "delegate ... }; ", "Replace All" mode:

public class Test
{
	public static void Do()
	{
		DictionaryEvents<string, string> dict = new DictionaryEvents<string, string>();
		CollectionEvents<string> coll = new CollectionEvents<string>();

		EventHandler<BeforeAddRemoveEventArgs<KeyValuePair<string, string>>> handler = delegate { throw new InvalidOperationException(string.Format("Whoops!")); };
		dict.BeforeAddRemove += handler;
		coll.BeforeAddRemove += handler;
	}
}

The coll.BeforeAddRemove += handler; line has an error because the delegate types are not compatible (have different event args).

The "replace all" candidates should be filtered more thoroughly.

Issue was closed