Binding Between elements inside DataTemplate

How can I make binding between properties of two elements inside dataTemplate ?

example : // Bind Text property to Content pro开发者_如何学Pythonperty

<DataTemplate>
  <TextBox Text="{Binding}" />
  <Label Content="{Binding}" />
</Datatemplate>

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If I correctly understood.

<DataTemplate>
<TextBox x:Name="p_text" Text="{Binding login}"/>
<Button Content="{Binding ElementName=p_text, Path Text}"/>
</DataTemplate>