public void HandleDragLeave(object sender, DragEventArgs e)
        {
            DbComparisonViewModel viewModel = (DbComparisonViewModel)this.DataContext;

            if (!e.Data.GetDataPresent(AppValues.ProfileDataFormat) || !viewModel.CanDoClearProfilesCommand(this))
            {
                e.Effects = DragDropEffects.None;
                e.Handled = true;
            }
        }
        public void HandleDrop(object sender, DragEventArgs e)
        {
            DbComparisonViewModel viewModel = (DbComparisonViewModel)this.DataContext;

            if (e.Data.GetDataPresent(AppValues.ProfileDataFormat) && viewModel.CanDoClearProfilesCommand(this))
            {
                Border dropTarget = ViewHelpers.FindAncestor <Border>((DependencyObject)e.OriginalSource);

                Profile profile = (Profile)e.Data.GetData(AppValues.ProfileDataFormat);

                if (dropTarget.Name == DbComparisonViewModel.LeftDropTargetElementName)
                {
                    viewModel.LeftProfile = profile;
                }
                else if (dropTarget.Name == DbComparisonViewModel.RightDropTargetElementName)
                {
                    viewModel.RightProfile = profile;
                }
            }
        }