private void Yeknowledge_ResizeEnd(object sender, EventArgs e)
{
tabControl.Refresh();
MainTree.Refresh();;
this.Refresh();
Application.DoEvents();
}
private void Yeknowledge_ResizeBegin(object sender, EventArgs e)
{
MainTree.Size = new Size(200, this.Size.Height);
tabControl.Size = new Size(this.Size.Width - 200, this.Size.Height);
tabControl.Refresh();
MainTree.Refresh();;
this.Refresh();
Application.DoEvents();
}