James S. reported:

System.ArgumentOutOfRangeException: Specified argument was out of the range of valid values. (Parameter 'rowIndex') at System.Windows.Forms.DataGridView.InvalidateRow(Int32 rowIndex) at SystemTrayMenu.Business.Menus.Dgv_MouseDown(Object sender, MouseEventArgs e) in D:\a\1\s\Business\Menus.cs:line 1099 at System.Windows.Forms.Control.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.DataGridView.OnMouseDown(MouseEventArgs e) at System.Windows.Forms.Control.WmMouseDown(Message

although we check the range in line 1094 and 1095, there is an out of range exception. That means there is already too much happening in rowData.MouseDown() and we have to check the range again