Split C# collection into equal parts, maintaining sort

Question

I am trying to split a collection into multiple collections while maintaining a sort I have on the collection. I have tried using the following extension method, but it breaks

Answer 1

    double partLength = list.Count() / (double)parts;

    int i = 0;
    var splits = from name in list
                 group name by Math.Floor((double)(i++ / partLength)) into part
                 select part;