protected virtual void OnContentRemoved(DockContentEventArgs e)
{
EventHandler<DockContentEventArgs> handler = (EventHandler<DockContentEventArgs>)Events[ContentRemovedEvent];
if (handler != null)
handler(this, e);
}
/// <summary>
/// Handles the ContentRemoved event of the <see cref="dockPanel"/> control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="DockContentEventArgs"/> instance containing the event data.</param>
private void dockPanel_ContentRemoved(object sender, DockContentEventArgs e)
{
CacheOpenMaps();
}