c# reference to reference
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Is there any way to do the following in C#?

    List<int> aList = new List<int>();
    List<int> bList = new List<int>();
    ... // fill the list somehow
    List<int> referece; //?????
    if (doThis)
        referece = aList;
    else
        referece = bList;
    
    reference.DoSomethingWithSelectedList();

Is this possible in C#? In C++ I would take a referece to a list, but in c#?