Small refactoring MtApi (MT5) and MtService. Started version 1.0.22 of MtService

MtApi5/ExtensionMethods.cs

@@ -1,28 +1,19 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 
 namespace MtApi5
 {
-    static class ExtensionMethods
+    internal static class ExtensionMethods
     {
         #region Event Methods
         public static void FireEvent(this EventHandler eventHandler, object sender)
         {
-            if (eventHandler != null)
-            {
-                eventHandler(sender, EventArgs.Empty);
-            }
+            eventHandler?.Invoke(sender, EventArgs.Empty);
         }
 
         public static void FireEvent<T>(this EventHandler<T> eventHandler, object sender, T e)
             where T : EventArgs
         {
-            if (eventHandler != null)
-            {
-                eventHandler(sender, e);
-            }
+            eventHandler?.Invoke(sender, e);
         }
 
         #endregion

MtApi5/MtApi5.csproj

@@ -35,6 +35,7 @@
     <Reference Include="System" />
     <Reference Include="System.Configuration.Install" />
     <Reference Include="System.Core" />
+    <Reference Include="System.ServiceModel" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
     <Reference Include="Microsoft.CSharp" />