private void Navigate(Interfaces_And_Enums.OrderManagerTab tab)
 {
     if (OnNavigateTo != null)
     {
         NewEnquiryViewModel = new NewEnquiryViewModel();
         OnNavigateTo(tab);
     }
 }
 private void newEnquiryControl_OnNavigateTo(Interfaces_And_Enums.OrderManagerTab tab)
 {
     switch (tab)
     {
         case Interfaces_And_Enums.OrderManagerTab.MyTasks:
             myTasks.Reload();
             viewOrdersTabControl.SelectedIndex = 1;
             break;
         case Interfaces_And_Enums.OrderManagerTab.AllOrders:
             allOrdersControl.Reload();
             viewOrdersTabControl.SelectedIndex = 2;
             break;
     }
 }