public override VirtualFile GetFile(string virtualPath)
{
virtualPath = virtualPath
.Replace("~/Scripts/AjaxControlToolkit/", "../../AjaxControlToolkit.StaticResources/Scripts/")
.Replace("~/Content/AjaxControlToolkit/Styles", "../../AjaxControlToolkit.StaticResources/Styles/");
return new VirtualFileImpl(virtualPath);
}