See given below steps:

1 Create new project.



2. Right side in Solution Explorer double click on MainPage.xaml.



3. Write the following XAML code in Grid.
  1. <StackPanel>
  2. <!--First TextBox-->
  3. <TextBox Name="FirstTextBox">
  4. </TextBox>
  5. <!--Second TextBox-->
  6. <TextBox Name="SecondTextBox" Text="{Binding ElementName=FirstTextBox, Path=Text}">
  7. </TextBox>
  8. </StackPanel>




















4. Here you get the your working app on Emulator.