protected virtual void ExecuteCancelCommand()
 {
     if (IsDialog)
     {
         this.DialogResult = false;
     }
     else
     {
         GlobalCommands.NavigateToSingleActiveRegion(RegionNames.MainContentRegion, typeof(MainBlankView));
     }
 }
 public virtual void ExecuteCancelCommand()
 {
     GlobalCommands.NavigateToSingleActiveRegion(RegionNames.MainContentRegion, typeof(MainBlankView));
 }