Label with Data Binding
<Window x:Class="ClassicControls.LabelTest" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="LabelTest" Height="300" Width="300" > <StackPanel Margin="5"> <Label Target="{Binding ElementName=txtA}">Choose _A</Label> <TextBox Name="txtA"></TextBox> <Label Target="{Binding ElementName=txtB}">Choose _B</Label> <TextBox Name="txtB"></TextBox> </StackPanel> </Window>