<Window x:Class="Commands.CustomCommand"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Commands" Height="300" Width="300"
    xmlns:local="clr-namespace:Commands"
    >
  <Window.CommandBindings>

    <CommandBinding Command="local:DataCommands.Requery"
                    Executed="RequeryCommand"/>
  </Window.CommandBindings>

  <Grid>
    <Button Margin="5" Command="local:DataCommands.Requery">Requery</Button>      
    </Grid>
</Window>
