Add

Adds the specified Pen to the collection.

Clone

Returns a shallow copy of this PenCollection object.

Contains

Checks whether the specified Pen is contained in the collection.

IndexOf

Returns the index of the first occurrence of the specified Pen.

Insert

Inserts the specified Pen at the specified position within the collection.

Remove

Removes the first occurrence of the specified Pen from the collection.

RemoveAt

Removes the Pen at the specified index.