public bool Contains(Permission permission)
 {
     return(List.Contains(permission));
 }
 public int IndexOf(Permission permission)
 {
     return(List.IndexOf(permission));
 }
 public void Remove(Permission permission)
 {
     List.Remove(permission);
 }
 public void Insert(int index, Permission permission)
 {
     List.Insert(index, permission);
 }
 public int Add(Permission permission)
 {
     return(List.Add(permission));
 }