public void Insert(int index, ICfaRegion item) { throw new InvalidOperationException(); }
public int IndexOf(ICfaRegion item) { return(regions.IndexOf(item)); }
public bool Contains(ICfaRegion item) { return(regions.Contains(item)); }
bool ICollection <ICfaRegion> .Remove(ICfaRegion item) { throw new InvalidOperationException(); }
public void Add(ICfaRegion item) { throw new InvalidOperationException(); }