In this WPF application, we take one textbox (for input value) and one label (for output value).

This is the simple code in xaml

 <Window x:Class="WpfApplication2.Window1"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     Title="Window1" Height="350" Width="519">
    <Grid Height="318" Width="469">
          <StackPanel Margin="10,48,91,128" Name="stackPanel1" >
            <Label Content="Databind Textbox to label "/>            
             <Label Content="Enter Value: "/>
            <TextBox Height="30" x:Name="txtinput" Background="AliceBlue" Width="189" AllowDrop="True"   />
            <Label Content="Display TextBox Value: "/>
            <Label Height="31" Name="label1" Background="AliceBlue" Width="189"  Content="{Binding Text,ElementName=txtinput,UpdateSourceTrigger=PropertyChanged}"></Label>
          </StackPanel>
  
    </Grid>
 </Window>

 

Note:  highlight portion show the binding text data to content properties of label control.

Output:

Run the program and input the value in textbox it show in label control as here

 So, this is the simple demonstration of how to bind the textbox data to label control at runtime.

 You should read also this Article - Frame control in WPF