Added NightAlert project for travel kit

ThirdParty/SocketIoClientDotNet/Src/SocketIoClientDotNet.net45/Client/On.cs

@@ -0,0 +1,57 @@
+using Quobject.EngineIoClientDotNet.ComponentEmitter;
+using System;
+
+namespace Quobject.SocketIoClientDotNet.Client
+{
+    public class On
+    {
+        private On() { }
+
+        public static IHandle Create(Emitter obj, string ev, IListener fn)
+        {
+            obj.On(ev, fn);
+            return new HandleImpl(obj,ev,fn);
+        }
+
+        public class HandleImpl : IHandle
+        {
+            private Emitter obj;
+            private string ev;
+            private IListener fn;
+
+            public HandleImpl(Emitter obj, string ev, IListener fn)
+            {
+                this.obj = obj;
+                this.ev = ev;
+                this.fn = fn;
+            }
+
+            public void Destroy()
+            {
+                obj.Off(ev, fn);
+            }
+        }
+
+        public class ActionHandleImpl : IHandle
+        {
+            private Action fn;
+
+            public ActionHandleImpl(Action fn)
+            {
+                this.fn = fn;
+            }
+
+            public void Destroy()
+            {
+                fn();
+            }
+        }
+
+        public interface IHandle
+        {
+            void Destroy();
+        }
+     
+    }
+
+}