Applying week numbers according to the ISO Standard

The ASP NET AJAX Calendar does not apply week numbers according to the ISO standard by default. This is because the ASP.NET Framework itself does not. However, this can be configured easily at runtime:

ASPNET

<form id="form2" runat="server">
    <telerik:RadScriptManager ID="RadScriptManager1" runat="server">
    </telerik:RadScriptManager>
    <div>
        <telerik:RadCalendar RenderMode="Lightweight" ID="RadCalendar1" runat="server" FirstDayOfWeek="Monday" />
    </div>
</form>

C#

protected void Page_Load(object sender, EventArgs e)
{
    System.Globalization.CultureInfo c = new System.Globalization.CultureInfo(RadCalendar1.CultureInfo.ToString());
    c.DateTimeFormat.CalendarWeekRule = System.Globalization.CalendarWeekRule.FirstFourDayWeek;
    RadCalendar1.CultureInfo = c;
}

VB.NET

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    Dim c As New System.Globalization.CultureInfo(RadCalendar1.CultureInfo.ToString())
    c.DateTimeFormat.CalendarWeekRule = System.Globalization.CalendarWeekRule.FirstFourDayWeek
    RadCalendar1.CultureInfo = c
End Sub