C#

List<PositionValues> list = new List<PositionValues>();
 PositionValues item1 = new PositionValues();
 item1.Position = 2;
 item1.Value = 44;
 list.Add(item1);

 PositionValues item2 = new PositionValues();
 item2.Position = 1;
 item2.Value = 33;
 list.Add(item2);

 var resultList = from b in list group b by b.Position into g orderby b.Value select b;

public struct PositionValues
{
    /// <summary>
    /// The position.
    /// </summary>
    public int Position;

    /// <summary>
    /// The position.
    /// </summary>
    public double Value;
}