How to convert SortedList to some other type of same kind?

Question

I have some thing like below.
System::Collections::Generic::SortedList<UInt16, UInt16> ^ franges;

But i wrote hell a lot of code using this. Now i don't want the list to be sorted. 
So can I change the this SortedList to some other type of same kind.
For example Dictionary or IDictionary can be used in similar way.
Similar to these types i want some other of this kind except Dictionary.