Passing a list of objects to .net

Hello all:

I have a .net class with a public method as follows

public List<Orders> getOrder(List<Customers>)

Where customer is a class object.

When calling getOrder() from AX what is the parameter type that is compatible with list<Customers> ?

I have tried

List = new List(Types::Class/Container/Anytype)

Arrays and ClrObject

Let me know if anyone has the answer to this.

Thanks

Abby