<Window x:Class="DTSample.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="DTSample" Height="500" Width="500"
    xmlns:er="clr-namespace:DTSample" 
    Loaded="OnLoaded" 
    xmlns:d="http://schemas.microsoft.com/expression/interactivedesigner/2006" 
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    >
  
  <StackPanel><!--, Mode = TwoWay-->
    <Button x:Name="Button1" Content="I'm button1" MouseEnter="BT1_MouseEnter" MouseLeave="BT1_MouseLeave" Height="100" Width="200"></Button>
    <Button x:Name="Button2" Margin="0,30,0,0" Content="I'm button2" MouseEnter="BT2_MouseEnter" MouseLeave="BT2_MouseLeave" Height="100" Width="200"></Button>
    
    <!--<Button x:Name="Button1" Content="{Binding Path=Content}" MouseEnter="BT1_MouseEnter" MouseLeave="BT1_MouseLeave"  Click="Onclick" Height="{Binding Path=Height}" Width="200"></Button>
    <Button x:Name="Button2" Margin="0,30,0,0" Content="I'm button2" MouseEnter="BT2_MouseEnter" MouseLeave="BT2_MouseLeave" Height="100" Width="200"></Button>-->
  </StackPanel>
</Window>