C# – How to set canvas ZIndex WPF button control in Click Event

I have three buttons lying one by one. I want to show top of all button, which i click. So that I have set canvas ZIndex in XAML Code. But I want to do this in Code Behind.

My XAML Output & Code –

<Button Name="Button1" Canvas.ZIndex="3" Content="Button1" Canvas.Top="100" Width="163" Height="58" FontSize="26" Click="Button1_Click" />
<Button Name="Button2" Canvas.ZIndex="2" Content="Button1" Canvas.Top="100" Canvas.Left="130" Width="163" Height="58" FontSize="26" Click="Button2_Click" />
<Button Name="Button3" Canvas.ZIndex="1" Content="Button1" Canvas.Top="100" Canvas.Left="260" Width="163" Height="58" FontSize="26" Click="Button3_Click" />

My XAML Output & Code (Check How the ZIndex was Changed)-

<Button Name="Button1" Canvas.ZIndex="3" Content="Button1" Canvas.Top="100" Width="163" Height="58" FontSize="26" Click="Button1_Click" />
<Button Name="Button2" Canvas.ZIndex="2" Content="Button1" Canvas.Top="100" Canvas.Left="130" Width="163" Height="58" FontSize="26" Click="Button2_Click" />
<Button Name="Button3" Canvas.ZIndex="1" Content="Button1" Canvas.Top="100" Canvas.Left="260" Width="163" Height="58" FontSize="26" Click="Button3_Click" />

How I change the Canvas.ZIndex property in WPF button control in Click Event?