Issue #57: Added function PositionSelectByTicket into C# code

MtApi5/Mt5CommandType.cs

@@ -114,5 +114,7 @@ namespace MtApi5
 
         //Requests
         MtRequest                           = 155,
+
+        PositionSelectByTicket              = 69
     }
 }

MtApi5/MtApi5Client.cs

@@ -223,6 +223,17 @@ namespace MtApi5
             return SendCommand<bool>(Mt5CommandType.PositionSelect, commandParameters);
         }
 
+        ///<summary>
+        ///Selects an open position to work with based on the ticket number specified in the position. If successful, returns true. Returns false if the function failed.
+        ///</summary>
+        ///<param name="ticket">Position ticket.</param>
+        public bool PositionSelectByTicket(ulong ticket)
+        {
+            var commandParameters = new ArrayList { ticket };
+
+            return SendCommand<bool>(Mt5CommandType.PositionSelectByTicket, commandParameters);
+        }
+
         ///<summary>
         ///The function returns the requested property of an open position, pre-selected using PositionGetSymbol or PositionSelect.
         ///</summary>