Book query tracking

Yavsc/Models/Billing/NominatvieCommand.cs

@@ -8,7 +8,7 @@ using Yavsc.Models.Workflow;
 namespace Yavsc.Models.Billing
 {
 
- public class NominativeServiceCommand<T> : Query<T> where T:Service
+ public class NominativeServiceCommand<T> : Query<T> where T:Service 
   {
 
     public string ClientId { get; set; }
@@ -29,11 +29,7 @@ namespace Yavsc.Models.Billing
 
     public DateTime? ValidationDate {get; set;}
 
-    /// <summary>
-    /// Command creation Date & time
-    /// </summary>
-    /// <returns></returns>
-    public DateTime CreationDate {get; set;}
+
 
     public decimal? Previsional { get; set; }
     /// <summary>

Yavsc/Models/Billing/Query.cs

@@ -1,11 +1,32 @@
+using System;
 using Yavsc.Interfaces.Workflow;
 using Yavsc.Models.Market;
 
 namespace Yavsc.Models.Billing
 {
 
-    public class Query<P> where P : BaseProduct
+    public class Query<P>: IBaseTrackedEntity  where P : BaseProduct
     {
+        public DateTime DateCreated
+        {
+            get; set;
+        }
+
+        public DateTime DateModified
+        {
+             get; set;
+        }
+
+        public string UserCreated
+        {
+             get; set;
+        }
+
+        public string UserModified
+        {
+             get; set;
+        }
+
         QueryStatus Status { get; set; }
     }