Двумерный массив отобразить в DataGridView - Visual Basic .NET

Формулировка задачи:

Нужно сгенерировать массив двумерный т.е. матрица и в датагридвью отобразить. не пойму что не так делаю

Public Class Form1 
Dim mas(5, 5) As Int32 
Dim rnd As New Random() 
Dim i As Int32 
Dim j As Int32 
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click 
DataGridView1.ColumnCount = 5 
DataGridView1.RowCount = 5 
For i = 0 To 4 
For j = 0 To 4 
mas(i, j) = rnd.Next(-50, 50) 
For i = 0 To 4 
For j = 0 To 4 
DataGridView1.Rows(i).Cells(j).Value = mas(i, j).ToString() 
 
Next 
Next 
Next 
Next 

End Sub 
End Class

Решение задачи: «Двумерный массив отобразить в DataGridView»

textual
                            Листинг программы 
                        

                            Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
    Dim mas(4, 4) As Int32
    Dim rnd As New Random()
    DataGridView1.ColumnCount = 5
    DataGridView1.RowCount = 5
    For i As Integer = 0 To 4
        For j As Integer = 0 To 4
            mas(i, j) = Rnd.Next(-50, 50)
        Next
    Next
    For i As Integer = 0 To 4
        For j As Integer = 0 To 4
            DataGridView1.Rows(i).Cells(j).Value = mas(i, j).ToString()
        Next
    Next
End Sub
                        