>I have a Project object. On it is a property called QueryItems. QueryItems is a List containing this class:
>

>How do I do this?

Something like this should work. You'll have to adjust it for your own code:

List<csQueryItem> project = new List<csQueryItem>();

project.Add(new csQueryItem("C7497A"));
project.Add(new csQueryItem("A7025A"));
project.Add(new csQueryItem("A6913A"));
project.Add(new csQueryItem("A9918A"));

var sortedProject = project.OrderBy(i => i.QueryString);