Action<T1, T2, T3, T4> public sealed delegate Action<T1, T2, T3, T4> : MulticastDelegate Documentation public Action(object object, IntPtr method) public virtual IAsyncResult BeginInvoke(T1 arg1, T2 arg2, T3 arg3, T4 arg4, AsyncCallback callback, object object) public virtual void EndInvoke(IAsyncResult result) public virtual void Invoke(T1 arg1, T2 arg2, T3 arg3, T4 arg4)