How to Fill Combobox with Month Names And There values Dynamically

protected void Page_Load(object sender, EventArgs e)
{
    var months = System.Globalization.DateTimeFormatInfo.InvariantInfo.MonthNames;
    DropDownList1.DataSource = months;
    DropDownList1.DataBind();
}

Dim i As Integer = 1
            Do While i <= 12
                myvar = MonthName(i, True)
                cboToMonth.Items.Add(New ListItem(myvar, i))
                i = i + 1
            Loop

protected void BindMonthList(DropDownList ddl)
{
    var monthList = System.Globalization.DateTimeFormatInfo.InvariantInfo.MonthNames.Select((item, index) => new
    {
        Month = item,
        Value = index+1
    });
    ddl.DataSource = monthList;
    ddl.DataTextField = "Month";
    ddl.DataValueField = "Value";
    ddl.DataBind();
}

if (this.ddlMesi.Items.Count <= 0)
    for (int i = 1; i <= 12; i++)
    {
        ddlMesi.Items.Add(new ListItem(
            System.Globalization.DateTimeFormatInfo.CurrentInfo.GetMonthName(i),
            i.ToString()
        ));
    }

private void Form1_Load(object sender, EventArgs e)
       {
           var months = System.Globalization.DateTimeFormatInfo.InvariantInfo.MonthNames;
           comboBox1.DataSource = months;

       }