C# Sortable collection which allows duplicate keys

Question

I am writing a program to set a sequence in which various objects will appear in report. The sequence is the Y position (cell) on Excel spreadsheet.

A demo part of code is below. What I want to accomplish is to have a collection, which will allow me to add multiple objects and I can get a sorted collection based on the sequence

SortedList list = new SortedList();

Header h = new Header();
h.XPos = 1;
h.name = "Header_1";
list.Add(h.XPos, h);

h = new Header();
h.XPos = 1;
h.name = "Header_2";
list.Add(h.XPos, h);

I know that the SortedList will not allow this and I have been searching for alternate. I don't want to eliminate the duplicates and already tried List<KeyValuePair<int, object>>.

Thanks.

Answer 1

Thanks a lot for your help. While searching more, I found this solution. (Available in Stackoverflow.com in other question)

First, I created a class which would encapsulate my objects for classes (Headers,Footer etc)

public class MyPosition
{
    public int Position { get; set; }
    public object MyObjects{ get; set; }
}

So this class is supposed to hold on the objects, and PosX of each object goes as int Position

List<MyPosition> Sequence= new List<MyPosition>();
Sequence.Add(new MyPosition() { Position = 1, Headerobject });
Sequence.Add(new MyPosition() { Position = 2, Headerobject1 });
Sequence.Add(new MyPosition() { Position = 1, Footer });

League.Sort((PosA, PosB) => PosA.Position.CompareTo(PosB.Position));

What eventually I get is the sorted "Sequence" list.