public static void AdjustToMaxTextWidth(this CheckedListBox ctrl, int?maxVerticalItems)
{
var width = ctrl.GetMaxTextWidth();
// i add this for the size of the checkbox control in the begining of the item {CheckBoxWidth} + {TextWidth}
width += SystemInformation.VerticalScrollBarWidth;
ctrl.Width = ctrl.ColumnWidth = width; // The control must fit the size of the column
}