refactor and add using constants instead of hard coded strings ...

DI/XDIHelperExtension.cs

@@ -10,6 +10,7 @@ using xDataService.Models;
 using xExceptions.Constants;
 using xPushService.DI;
 using xPushService.Helpers;
+using xTagService.Constants;
 using xTagService.Helpers;
 using xTagService.Interfaces;
 using xTagService.Interfaces.Dtos;
@@ -80,8 +81,8 @@ namespace xTagService.DI
             var pushHelper = new XPushServiceHelper();
 
             //
-            pushHelper.AddHub<XTagDtoHub>("tagDto");
-            pushHelper.AddHub<XTagEntityHub>("tagEntity");
+            pushHelper.AddHub<XTagDtoHub>(XTagServiceConstants.XTagDtoHub);
+            pushHelper.AddHub<XTagEntityHub>(XTagServiceConstants.XTagEntityHub);
 
             //
             app.UseXPushService(pushHelper);
@@ -106,7 +107,7 @@ namespace xTagService.DI
         /// <summary>
         /// a LogTag for Service ...
         /// </summary>
-        private static string XLogTag = "XTagService";
+        private static string XLogTag = XTagServiceConstants.XTagServiceDILogTag;
 
         /// <summary>
         /// print a log in Console ...
@@ -179,9 +180,9 @@ namespace xTagService.DI
                     //
                     descriptor = typeof(XTagServiceHelper)
                         .InvokeGenericMethod<XRepositoryDescriptor>(
-                            methodName: "GetXTagEFRepositoryDescriptor",
+                            args: null,
                             runtimeType: contextType,
-                            args: null
+                            methodName: XTagServiceConstants.GetXTagEFRepositoryDescriptor
                     );
                     break;