public bool Contains(StepListItem value)
 {
     return(List.Contains(value));
 }
 public int Add(StepListItem value)
 {
     value.List = this.StepList;
     return(List.Add(value));
 }
 public void Insert(int index, StepListItem value)
 {
     List.Insert(index, value);
 }
 public void Remove(StepListItem value)
 {
     List.Remove(value);
 }
 public int IndexOf(StepListItem value)
 {
     return(List.IndexOf(value));
 }