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