static BaseResponseHeader()
{
#if NET_2_0
HttpRuntimeSection section = WebConfigurationManager.GetWebApplicationSection("system.web/httpRuntime") as HttpRuntimeSection;
#else
HttpRuntimeConfig section = HttpContext.GetAppConfig("system.web/httpRuntime") as HttpRuntimeConfig;
#endif
headerCheckingEnabled = section == null || section.EnableHeaderChecking;
}