public class DataCommands
    {
        public static RoutedUICommand Requery =
            new RoutedUICommand("Requery", "Requery", typeof(DataCommands), 
                new InputGestureCollection { new KeyGesture(Key.R, ModifierKeys.Control, "CTRL+R") });
    }

<Window x:Class="Example1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:wpfApplication3="clr-namespace:WpfApplication3"
        Title="MainWindow" Height="600" Width="600">
    <Window.CommandBindings>
        <CommandBinding Command="{x:Static wpfApplication3:DataCommands.Requery}"
                        Executed="CommandBinding_Executed_1"/>
    </Window.CommandBindings>
    <Grid>
        <Button Width="100" Height="25" Command="{x:Static wpfApplication3:DataCommands.Requery}"/>
    </Grid>
</Window>