public void SetLayoutManager(FlowLayoutManager layoutManager)
{
Precondition.ArgumentNotNull(layoutManager, nameof(layoutManager));
if (_layoutManager != null)
panel1.Controls.Remove(_layoutManager);
_layoutManager = layoutManager;
panel1.Controls.Add(_layoutManager);
_layoutManager.Dock = DockStyle.Fill;
_layoutManager.AutoSize = false;
_layoutManager.AutoScroll = true;
_layoutManager.WrapContents = true;
_layoutManager.BringToFront();
UpdateWidth();
}