or
<telerik:AreaSeries CombineMode="Stack"></telerik:AreaSeries>AreaSeries newSer1 = new AreaSeries();newSer1.Focusable = true;newSer1.ItemsSource = new List<int> { 1, 2, 3 };newSer1.CombineMode = ???string controlName = "PLACEHOLDER_" + getNewId(); // ex. PLACEHOLDER_1string controlTag = getNewTag(); // ex. 100231var button = new RadButton{ Name = controlName, Tag = controlTag, // this tag is used to retrieve custom properties from database Width = 100, Height = 32,};// add the image to contentbutton.Content = this.getCustomUIElementByPlaceholder(message, controlName);button.MouseDoubleClick += SelectPlaceHolder; // event fired when user doubleclick the button// create the UI element// new class with copyable=true overridevar container = new CopyableInlineUIContainer { UiElement = button, Width = button.Width, Height = button.Height, Tag = controlName };// original code // var container = new InlineUIContainer { UiElement = button, Width = button.Width, Height = button.Height, Tag = controlName };// invoke the insert method// Note: editor if a WPF control of type RadRichTextBoxeditor.InsertInline(container);// add a text coomment string sContentComment = "Custom placeholder NAME " + controlName + " TAG " + controlTag;var comment = new Comment(sContentComment) { Name = string.Concat("m", controlTag) };editor.ShowComments = true;var startPosition = editor.Document.CaretPosition;var endPosition = new DocumentPosition(startPosition);startPosition.MoveToCurrentWordStart();endPosition.MoveToCurrentWordEnd();editor.Document.Selection.AddSelectionStart(startPosition);editor.Document.Selection.AddSelectionEnd(endPosition);editor.Document.InsertComment(startPosition, endPosition, comment);<telerik:RadWatermarkTextBox FontFamily="Segoe WP Light" FontSize="12" Foreground="White" FontStyle="Italic" CaretBrush="White" Background="Transparent" Height="20" BorderThickness="0" WatermarkBehavior="HideOnClick" Margin="3,0,3,0" Grid.Column="1" x:Name="radRichTextBox" VerticalAlignment="Center">
<telerik:RadWatermarkTextBox.WatermarkTemplate>
<DataTemplate>
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Left" FontFamily="Segoe WP Light" FontSize="12" Foreground="White" FontStyle="Italic" Text="Enter custom status"></TextBlock>
</DataTemplate>
</telerik:RadWatermarkTextBox.WatermarkTemplate>
</telerik:RadWatermarkTextBox>

