Private Sub SetBorderAndGridlineStyles()

    With Me.dataGridView1
        .GridColor = Color.BlueViolet
        .BorderStyle = BorderStyle.Fixed3D
        .CellBorderStyle = DataGridViewCellBorderStyle.None
        .RowHeadersBorderStyle = _
            DataGridViewHeaderBorderStyle.Single
        .ColumnHeadersBorderStyle = _
            DataGridViewHeaderBorderStyle.Single
    End With

End Sub

private void SetBorderAndGridlineStyles()
{
    this.dataGridView1.GridColor = Color.BlueViolet;
    this.dataGridView1.BorderStyle = BorderStyle.Fixed3D;
    this.dataGridView1.CellBorderStyle =
        DataGridViewCellBorderStyle.None;
    this.dataGridView1.RowHeadersBorderStyle =
        DataGridViewHeaderBorderStyle.Single;
    this.dataGridView1.ColumnHeadersBorderStyle =
        DataGridViewHeaderBorderStyle.Single;
}