Returns an object that can be used to iterate through this collection.
Assembly: System (in System.dll)
The object that is returned by this method is initially positioned before the first element in this collection. You must call the MoveNext method before you can access the first element. To access the element at the current position, call the Current property.
Do not modify the collection while using the enumerator. If the collection is modified while an enumerator is in use, an attempt to set the position by calling MoveNext or Reset causes an InvalidOperationException.