System.Delegate.Combine C# (CSharp) Method

		public static Delegate Combine(Delegate a, Delegate b)
		{
			if (a == null)
                return b;
            else if (b == null)
                return a;
            else if (a.As<JsObject>().member("all"))
                return ((MulticastDelegate)a).Add(b);
            else
                return new MulticastDelegate(a.Target, new[] { a, b });
		}