obtain generic enumerator from an array

In C#, how does one obtain a generic enumerator from a given array?

In the code below, MyArray is an array of MyType objects. I'd like to obtain MyIEnumerator in the fashion shown, but it seems that I obtain an empty enumerator (although I've confirmed that MyArray.Length > 0).

MyType[] MyArray = ... ;
IEnumerator<MyType> MyIEnumerator = MyArray.GetEnumerator() as IEnumerator<MyType>;