protected override void OnDockStateChanged(EventArgs e)
{
base.OnDockStateChanged(e);
Sidebar sidebar = view as Sidebar;
if (sidebar != null)
{
if (this.DockState == DockState.DockLeftAutoHide || this.DockState == DockState.DockRightAutoHide)
{
sidebar.Collapsed = true;
}
else
{
sidebar.Collapsed = false;
}
}
}