<Window x:Class="WindowPageHost.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WindowWithFrame" Height="300" Width="392" > <Grid Margin="3"> <Grid.ColumnDefinitions> <ColumnDefinition></ColumnDefinition> <ColumnDefinition></ColumnDefinition> </Grid.ColumnDefinitions> <StackPanel> <Button Margin="3" Padding="3" Click="cmdClose_Click">Close</Button> </StackPanel> <Frame Grid.Column="1" Source="Page1.xaml" BorderBrush="Blue" BorderThickness="1"></Frame> </Grid> </Window> //File:Window.xaml.cs using System; using System.Collections.Generic; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Shapes; namespace WindowPageHost { public partial class Window1 : System.Windows.Window { public Window1() { InitializeComponent(); } private void cmdClose_Click(object sender, RoutedEventArgs e) { this.Close(); } } }