C#中用Tuple<int,int,int>存储的矩阵，又如何输出呢？

C#中用Tuple存储的矩阵，又如何输出呢？

 int[][] arr = new int[n][];
for (int i = 0; i < n; i++)
    arr[i] = new int[n];
foreach (var item in list)
    arr[item.Item1][item.Item2] = item.Item3;
for (int i = 0; i < n; i++)
{
    for (int j = 0; i < n; j++)
        Console.Write(arr[i][j] + "\t");
        Console.WriteLine();
}