<Window x:Class="ValidationIDataErrorInfo.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
        xmlns:my="clr-namespace:ValidationIDataErrorInfo"
        Title="MainWindow" Height="300" Width="700">
    <Window.Resources>
        <my:MyViewModel x:Key="MyViewModel"/>
    </Window.Resources>
    <Grid DataContext="{StaticResource MyViewModel}">
        <telerik:RadGridView Grid.Row="0" 
                             Name="clubsGrid" 
                             ItemsSource="{Binding Clubs}"
                             AutoGenerateColumns="False"
                             Margin="5">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn>
                    <telerik:GridViewDataColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Name, ValidatesOnDataErrors=True, Mode=OneWay, UpdateSourceTrigger=PropertyChanged}" />
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellTemplate>
                    <telerik:GridViewDataColumn.CellEditTemplate>
                        <DataTemplate>
                            <TextBox Text="{Binding Name, ValidatesOnDataErrors=True, Mode=TwoWay, UpdateSourceTrigger=LostFocus}" />
                        </DataTemplate>
                    </telerik:GridViewDataColumn.CellEditTemplate>
                </telerik:GridViewDataColumn>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding Established}"
                                            Header="Est." 
                                            DataFormatString="{}{0:yyyy}"/>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding StadiumCapacity}" 
                                            Header="Stadium" 
                                            DataFormatString="{}{0:N0}"/>
            </telerik:RadGridView.Columns>
        </telerik:RadGridView>
    </Grid>
</Window>
