VB.net如何访问二维数组中的行？

arrayName(rowIndex)

Dim matrix(,) As Integer = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}

' 访问第一行
Dim row1() As Integer = matrix(0)
Console.WriteLine("第一行的元素：")
For Each num As Integer In row1
    Console.Write(num & " ")
Next
Console.WriteLine()

' 访问第二行
Dim row2() As Integer = matrix(1)
Console.WriteLine("第二行的元素：")
For Each num As Integer In row2
    Console.Write(num & " ")
Next
Console.WriteLine()

' 访问第三行
Dim row3() As Integer = matrix(2)
Console.WriteLine("第三行的元素：")
For Each num As Integer In row3
    Console.Write(num & " ")
Next
Console.WriteLine()

第一行的元素：
1 2 3 
第二行的元素：
4 5 6 
第三行的元素：
7 8 9