Development ASP.Net Tutorial

Use the EnableTheming property to prevent a Skin  from being applied.
File: Simple\Calendar.skin
    BackColor="White"
    BorderColor="White"
    BorderWidth="1px"
    Font-Names="Verdana"
    Font-Size="9pt"
    ForeColor="Black"
    NextPrevFormat="FullMonth"
    Width="400px"
    Runat="Server">
            BackColor="#333399"
        ForeColor="White" />
            ForeColor="#999999" />
            BackColor="#CCCCCC" />
            Font-Bold="True"
        Font-Size="8pt"
        ForeColor="#333333"
        VerticalAlign="Bottom" />
            Font-Bold="True"
        Font-Size="8pt" />
            BackColor="White"
        BorderColor="Black"
        BorderWidth="4px"
        Font-Bold="True"
        Font-Size="12pt"
        ForeColor="#333399" />

File: ShowEnableTheming.aspx
<%@ Page Language="C#" Theme="Simple" %>


    Show EnableTheming


    
    

            id="Calendar1"
        Runat="server" />
    
            id="Calendar2"
        EnableTheming="false"
        Runat="server" />