Issue #284: MtApi5/MQL5 - added function GetSymbols

MtApi5/MtApi5Client.cs

@@ -2,6 +2,7 @@
 using MtClient;
 using MtApi5.MtProtocol;
 using MtApi5.MtProtocol.ICustomRequest;
+using System.Data;
 
 namespace MtApi5
 {
@@ -188,6 +189,15 @@ namespace MtApi5
             }
         }
 
+        ///<summary>
+        ///Load symbols
+        ///</summary>
+        public List<string>? GetSymbols(bool selected)
+        {
+            Dictionary<string, object> cmdParams = new() { { "Selected", selected } };
+            return SendCommand<List<string>>(ExecutorHandle, Mt5CommandType.GetSymbols, cmdParams);
+        }
+
         ///<summary>
         ///Checks if the Expert Advisor runs in the testing mode..
         ///</summary>

MtApi5/MtProtocol/Mt5CommandType.cs

@@ -259,6 +259,7 @@ namespace MtApi5.MtProtocol
         OrderSendAsync = 302,
         OrderCheck = 303,
         Buy = 304,
-        Sell = 305
+        Sell = 305,
+        GetSymbols = 306
     }
 }