Update socket Close to return Task, removed eventhandlers after opening socket

CryptoExchange.Net/CryptoExchange.Net.csproj

@@ -7,7 +7,7 @@
   <PropertyGroup>
     <PackageId>CryptoExchange.Net</PackageId>
 	<Authors>JKorf</Authors>
-    <PackageVersion>0.0.9</PackageVersion>
+    <PackageVersion>0.0.10</PackageVersion>
 	<PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <PackageProjectUrl>https://github.com/JKorf/CryptoExchange.Net</PackageProjectUrl>
 	<PackageLicenseUrl>https://github.com/JKorf/CryptoExchange.Net/blob/master/LICENSE</PackageLicenseUrl>

CryptoExchange.Net/Implementation/BaseSocket.cs

@@ -9,7 +9,7 @@ using CryptoExchange.Net.Interfaces;
 using SuperSocket.ClientEngine.Proxy;
 using WebSocket4Net;
 
-namespace CryptoExchange.Net
+namespace CryptoExchange.Net.Implementation
 {
     public class BaseSocket: IWebsocket
     {
@@ -69,9 +69,17 @@ namespace CryptoExchange.Net
                 handle(data);
         }
 
-        public void Close()
+        public async Task Close()
         {
-            socket.Close();
+            await Task.Run(() =>
+            {
+                ManualResetEvent evnt = new ManualResetEvent(false);
+                var handler = new EventHandler((o, a) => evnt.Set());
+                socket.Closed += handler;
+                socket.Close();
+                evnt.WaitOne();
+                socket.Closed -= handler;
+            });
         }
 
         public void Send(string data)
@@ -84,10 +92,13 @@ namespace CryptoExchange.Net
             return await Task.Run(() =>
             {
                 ManualResetEvent evnt = new ManualResetEvent(false);
-                socket.Opened += (o, s) => evnt.Set();
+                var handler = new EventHandler((o, a) => evnt.Set());
-                socket.Closed += (o, s) => evnt.Set();
+                socket.Opened += handler;
+                socket.Closed += handler;
                 socket.Open();
                 evnt.WaitOne();
+                socket.Opened -= handler;
+                socket.Closed -= handler;
                 return socket.State == WebSocketState.Open;
             });
         }

CryptoExchange.Net/Implementation/WebsocketFactory.cs

@@ -1,6 +1,6 @@
 using CryptoExchange.Net.Interfaces;
 
-namespace CryptoExchange.Net
+namespace CryptoExchange.Net.Implementation
 {
     public class WebsocketFactory : IWebsocketFactory
     {

CryptoExchange.Net/Interfaces/IWebsocket.cs

@@ -18,7 +18,7 @@ namespace CryptoExchange.Net.Interfaces
 
         Task<bool> Connect();
         void Send(string data);
-        void Close();
+        Task Close();
         void SetProxy(string host, int port);
     }
 }