Fields RemoveAt Function. Removes an item at a specified position from the collection. ABCpdf .NET PDF Library. From ABCpdf .net previous page next page RemoveAt Function Removes an item at a specified position from the collection. Syntax [C#] void RemoveAt(int index) [Visual Basic] Sub RemoveAt(index As Integer) may throw NotSupportedException() Params Name Description index The zero-based index of the item to remove. Notes Removes an item from the collection. All Fields collections are read only so calling this function will generate a NotSupportedException.. Example None. previous page start next page