You can use the AppStyling Visual Studio Add-in which is available from the Tools menu in Visual Studio or alternatively, you can manually add the settings into your web.config as seen below.
Good luck
<configSections> <section name="infragistics.web"
type="System.Configuration.SingleTagSectionHandler,System, Version=1.0.3300.0,
Culture=neutral,
PublicKeyToken=b77a5c561934e089" /> </configSections> <infragistics.web styleSetName="ElectricBlue" styleSetPath="~/ig_res"
enableAppStyling="true" />
Good luck