method StatusBar.BeginUpdate ()
Maintains performance when items are added to the control one at a time. This method prevents the control from painting until the EndUpdate method is called.

TypeDescription
This method prevents the control from painting until the EndUpdate method is called. The BeginUpdate and EndUpdate methods increases the speed of loading your items, by preventing painting the control when it suffers any change. Once that BeginUpdate method was called, you have to make sure that EndUpdate method will be called too.