Public Sub MT_Fill_Grid()
Dim row As DataGridViewRow() = New DataGridViewRow() {"1", "192.168.0.100", "255.255.255.0", "255.255.255.255", "60", "22-0B-3C-2D-00-01"}
GridDev_List.Rows.Add(row)
End Sub
or simply do
GridDev_List.Rows.Add("1", "192.168.0.100", "255.255.255.0", "255.255.255.255", "60", "22-0B-3C-2D-00-01")
try replacing Dim row As String() with Dim row As DataGridViewRow()