1    if (table != null)
 2                     {
 3                         //panMain.Enabled = false;
 4                         var names = table.AsEnumerable().Select(r => r["rName"]).Distinct();
 5                         foreach (var item in names)
 6                         {
 7                             this.listBAllRole.Items.Add(item.ToString());
 8                         }
 9 
10                         this.ListBSelectRole.Items.Add(txtRoles.Text.Trim());
11                     }