/// <summary>
/// Convenient helper method to unsubscribe from this Message type.
/// <para/>
/// Usage:
/// <list type="bullet">
/// <item><description>MessageClass.Register(this, msg => Handler) if the handler has the signature void Handler(MessageClass message)</description></item>
/// <item><description>MessageClass.Register(this, msg => Handler(msg.Data)) if the handler has the signature void Handler(TData data)</description></item>
/// </list>
/// </summary>
/// <param name="recipient">The instance which unregisters from the messages. Is most cases this will be <c>this</c>.</param>
/// <param name="handler">A delegate handling the incoming message. For example: msg => Handler(msg.Data).</param>
/// <param name="tag">The optional Catel mediator tag to be used.</param>
/// <exception cref="ArgumentNullException">The <paramref name="handler"/> is <c>null</c>.</exception>
public static void Unregister(object recipient, Action <TMessage> handler, object tag = null)
{
Argument.IsNotNull("handler", handler);
_mediator.Unregister(recipient, handler, tag);
}
protected override Task CloseAsync()
{
_messageMediator.Unregister <ActivatedExplorerTabMessage>(this, OnActivatedExplorerTabMessageReceived);
return(base.CloseAsync());
}
private void MainWindow_OnUnloaded(object sender, RoutedEventArgs e)
{
_messageMediator.Unregister(this);
}