Question

List<Widget> list = List<Widget>();
Widget widgetA = new Widget();
Widget widgetB = new Widget();
Widget widgetC = new Widget();
Widget widgetD = new Widget();
Widget widgetE = new Widget();
Widget widgetF = new Widget();
list.AddRange(new[] { widgetA, widgetB, widgetC, widgetD, widgetE, widgetF });

What would I need to do to sort starting somewhere in the middle?

for example,

list.AddRange(new[] { widgetD, widgetE, widgetF, widgetA, widgetB, widgetC });

Or, in other words, start the index somewhere in the middle and then wrap the remaining objects in order.

Answer 1

You can use a combination of Skip, Take and Union.

List<Widget> widgets = ...

// now to split and wrap
int startIndex = 3;
var newList = widgets.Skip(startIndex)
                     .Union(widgets.Take(startIndex)
                     .ToList();