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MyWpfProject.MainWindow mw = new MyWpfProject.MainWindow();
ElementHost.EnableModelessKeyboardInterop(mw);
mw.Show();

somapatrik

public class PrimeViewModel : INotifyPropertyChanged
{		
	protected bool SetProperty<T>(ref T backingStore, T value,
	[CallerMemberName] string propertyName = "",
	Action onChanged = null)
	{
		if (EqualityComparer<T>.Default.Equals(backingStore, value))
			return false;

		backingStore = value;

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public class RelayCommand : ICommand
{

	private Action<object> _execute;
	private Func<object, bool> _canExecute;

	public RelayCommand(Action<object> execute)
	{
		_execute = execute;
		_canExecute = null;