 <Grid x:Name="LayoutRoot">     <Grid.RowDefinitions>         <RowDefinition Height="Auto" />         <RowDefinition Height="*" />     </Grid.RowDefinitions>     <TextBox x:Name="UrlTextBox" Background="White" InputScope="URL" KeyDown="UrlTextBox_KeyDown" Margin="0,0,00,0" GotFocus="UrlTextBox_GotFocus" LostFocus="UrlTextBox_LostFocus" KeyUp="UrlTextBox_KeyUp"/>     <Grid x:Name="BrowserHost"    Grid.Row="0" GotFocus="BrowserHost_GotFocus">         <