void ReleaseDesignerOutlets ()
{
if (collapseButton != null) {
collapseButton.Dispose ();
collapseButton = null;
}
if (flexGrid != null) {
flexGrid.Dispose ();
flexGrid = null;
}
if (SortButton != null) {
SortButton.Dispose ();
SortButton = null;
}
}
}