private static void Initialize()
{
if (_providers == null)
{
HttpRuntime.CheckAspNetHostingPermission(AspNetHostingPermissionLevel.Low, "Feature_not_supported_at_this_level");
lock (_lockObject)
{
if (_providers == null)
{
SiteMapSection siteMap = RuntimeConfig.GetAppConfig().SiteMap;
if (siteMap == null)
{
_providers = new SiteMapProviderCollection();
}
else
{
if (!siteMap.Enabled)
{
throw new InvalidOperationException(System.Web.SR.GetString("SiteMap_feature_disabled", new object[] { "system.web/siteMap" }));
}
siteMap.ValidateDefaultProvider();
_providers = siteMap.ProvidersInternal;
_provider = _providers[siteMap.DefaultProvider];
_providers.SetReadOnly();
}
}
}
}
}
private static void Initialize()
{
if (_providers != null)
{
return;
}
HttpRuntime.CheckAspNetHostingPermission(AspNetHostingPermissionLevel.Low, SR.Feature_not_supported_at_this_level);
lock (_lockObject) {
if (_providers != null)
{
return;
}
SiteMapSection config = RuntimeConfig.GetAppConfig().SiteMap;
if (config == null)
{
// just return an empty collection so that designer will work.
_providers = new SiteMapProviderCollection();
return;
}
if (!config.Enabled)
{
throw new InvalidOperationException(SR.GetString(SR.SiteMap_feature_disabled, SiteMap.SectionName));
}
// Make sure the default provider exists.
config.ValidateDefaultProvider();
_providers = config.ProvidersInternal;
_provider = _providers[config.DefaultProvider];
_providers.SetReadOnly();
}
}
