//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
/// <summary> Return the index where the given de belongs, or -1 if this index is unknown.
/// More precisely, if this returns an index other than -1, it must always be true that
/// view[index-1] < de <= view[index], where the comparisons are done via
/// the view's IComparer.Compare method (if any).
/// </summary>
/// <param name="item">data item</param>
public override int IndexOf(object item)
{
return(EnumerableWrapper.IndexOf(item));
}