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Set a Style Programmatically

<Window x:Class="WpfApplication1.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Loaded="Window_Loaded" Title="WPF" Height="230" Width="140">     <Window.Resources>         <Style x:Key="labelStyle1">             <Setter Property="Label.Background" Value="LightYellow" />             <Setter Property="Label.HorizontalContentAlignment" Value="Center" />         </Style>         <Style x:Key="imageStyle1">             <Setter Property="Image.Source" Value="c:\image.png" />             <Setter Property="Image.Height" Value="140" />             <Setter Property="Image.Width" Value="96" />         </Style>         <Style x:Key="labelStyle2">             <Setter Property="Label.Background" Value="AliceBlue" />             <Setter Property="Label.Foreground" Value="DarkBlue" />         </Style>         <Style x:Key="imageStyle2">             <Setter Property="Image.Source" Value="c:\image.png" />             <Setter Property="Image.Height" Value="140" />             <Setter Property="Image.Width" Value="96" />         </Style>     </Window.Resources>     <StackPanel>         <Image x:Name="img"/>         <Label x:Name="lbl" Content="Hello" />     </StackPanel> </Window> //File:Window.xaml.cs using System; using System.Windows; namespace WpfApplication1 {     public partial class Window1 : Window     {         public Window1()         {             InitializeComponent();         }         private void Window_Loaded(object sender, RoutedEventArgs e)         {             lbl.Style = (Style)FindResource("labelStyle2");             img.Style = (Style)FindResource("imageStyle2");             //lbl.Style = (Style)FindResource("labelStyle1");             //img.Style = (Style)FindResource("imageStyle1");         }     } }