<StackPanel Name="root" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="WpfApplication1.FEMarginProgrammatic"> <StackPanel.Resources> <Style TargetType="Button"> <Setter Property="Height" Value="25"/> <Setter Property="Width" Value="250"/> <Setter Property="HorizontalAlignment" Value="Left"/> <Setter Property="FontSize" Value="20"/> </Style> </StackPanel.Resources> <Button Click="OnClick" Margin="10" Name="btn1">Click To See Change!!</Button> </StackPanel> //File:Window.xaml.cs using System; using System.Windows; using System.Windows.Controls; using System.Windows.Media; namespace WpfApplication1 { public partial class FEMarginProgrammatic { void OnClick(object sender, RoutedEventArgs e) { Thickness marginThickness = btn1.Margin; if(marginThickness.Left == 10) { btn1.Margin = new Thickness(60); } else { btn1.Margin = new Thickness(10); } } } }