ProtectedRangeCollection.Add Method

Name	Parameters	Description
Add(String, CellRange)	name, range	Creates a new protected range and adds it to the collection.
Add(String, IList<CellRange>)	name, ranges	Creates a protected range and adds it to a worksheet collection of protected ranges.
Add(String, String)	name, refersTo	Creates a new protected range and adds it to the collection.