public void Remove(SortingElement connectionString)
 {
     BaseRemove(connectionString.Column);
 }
 public void Remove(SortingElement connectionString)
 {
     BaseRemove(connectionString.Column);
 }
 public void Add(SortingElement connectionString)
 {
     BaseAdd(connectionString);
 }
 public void Add(SortingElement connectionString)
 {
     BaseAdd(connectionString);
 }