[C#] Ordinamento di una matrice

codice:
int[,] id = matrixPlusSort;
            int[,] idcol = new int[matrixPlusSort.GetLength(0), matrixPlusSort.GetLength(1)];
            int a;
            int b;
            int d;
            for (int i = 0; i < matrixPlus.GetLength(0); i++)
            {

                a = id[i, 0];
                d = id[i, 1];
                b = i;
                int b1 = i;
                while ((b > 0) && (id[b - 1, 0] > a))
                {
                    id[b, 0] = id[b - 1, 0];
                    b = b - 1;
                }
                id[b, 0] = a;
                idcol[b, 1] = d;
                idcol[b1, 1] = d;
            }
            int[,] id3 = new int[matrixPlusSort.GetLength(0), matrixPlusSort.GetLength(1)];
            for (int i = 0; i < matrixPlus.GetLength(0); i++)
            {
                id3[i, 0] = id[i, 0];
                id3[i, 1] = idcol[i, 1];
            }

  int[,] id =
  {
    { 30, 9 }, { 3, 2 }, { 41, 4 }, { 10, 7 }
  };
    
  List<Tuple<int, int>> tuple = new List<Tuple<int, int>>();
  for (int i = 0; i < id.GetLength(0); i++)
  {
    tuple.Add(Tuple.Create(id[i, 0], id[i, 1]));
  }
  var ordered = tuple.OrderBy(t => t.Item1).ToList();
  
  for (int i = 0; i < ordered.Count; i++)
  {
    id[i, 0] = ordered[i].Item1;
    id[i, 1] = ordered[i].Item2;
  }