问当添加重复数字时，哪个数字字典集合会重新排序项目？

EN

SortedSet<Project> prioritizedProjects = new SortedSet<Project>(new CompareProjByPriority());
...
Project rePrioritize = ...;
prioritizedProjects.Remove(rePrioritize);
rePrioritize.Priority = 1;
prioritizedProjects.Add(rePrioritize);

List<Project> projects = GetProjects();
Project project = projects[2]; // grab project on rank 3 (index 2 since it's 0 based)
projects.RemoveAt(2);          // pick it up
projects.Insert(0, project);   // place the project in front of the first

public static bool SetValue<T>(this List<T> collection, int oldValue, int newValue)
{
    if ((Math.Min(newValue, oldValue) <= -1) ||
        (Math.Max(newValue, oldValue) > collection.Count()))
    {
        return false;
    }
    if (newValue != oldValue)
    {
        var value = collection[oldValue];
        collection.RemoveAt(oldValue);
        if (newValue == collection.Count())
        {
            collection.Add(value);
        }
        else
        {
            collection.Insert(newValue, value);
        }
    }
    return true;
}

        var items = new List<char> { 'A', 'B', 'C' };
        var start = string.Join(", ", items); //"A, B, C"
        items.SetValue(2, 0);
        var result = string.Join(", ", items); //"C, A, B"