Window
要素の直後に
<Window.CommandBindings>
<CommandBinding Command="Copy" Executed="OnCtrlC"/>
</Window.CommandBindings>
を書く。C#側は
public partial class MainWindow : Window
{
private void OnCtrlC(object sender, RoutedEventArgs e)
{
//なんか
}
}
以上。
実例
yumetodo/ImageSizeRateCalculator: https://teratail.com/questions/174798