我如何阻止或冻结 dgv vb.net 中的行？

Question

 Private Sub DataGridView1_CellMouseClick(sender As Object, e As DataGridViewCellMouseEventArgs) Handles DataGridView1.CellMouseClick
    
Dim a As String = DataGridView1.Item(0, DataGridView1.CurrentRow.Index).Value
            If (MessageBox.Show("Block Data =" & a, "BLOCK", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) = Windows.Forms.DialogResult.OK) Then
                connect()

“在这里我想阻止或冻结数据行，所以请帮我获取代码” DataGridView1.Rows.Item(.RowIndex).Visible = False

            End If
 End Sub