static Logger()
{
try
{
LoggingSection section = GetConfigurationSection();
LoggingProviderCollection providerCollection = LoadAndInitializeProviderCollection(section);
LoggingProviderBase defaultProvider = GetDefaultProvider(section, providerCollection);
InitializeFallbackProviders(providerCollection);
CompleteInitialization(providerCollection, defaultProvider);
CircularReferenceFinder.Validate(providerCollection);
Logger.providers = providerCollection;
Logger.provider = defaultProvider;
}
catch (ProviderException pex)
{
// When a ProviderException or ConfigurationException is thrown, we store those and throw them
// when one of the public methods of Logger is called. This way the original exceptions are
// thrown and not a TypeInitializeException that wraps the original.
InitializationException = pex;
}
catch (ConfigurationException ceex)
{
InitializationException = ceex;
}
}
// Throws a ConfigurationErrorsException (descendant of ConfigurationException) on failure.
private static LoggingProviderBase GetDefaultProvider(LoggingSection loggingSection,
LoggingProviderCollection providerCollection)
{
LoggingProviderBase defaultProvider = providerCollection[loggingSection.DefaultProvider];
if (defaultProvider == null)
{
PropertyInformation property = loggingSection.ElementInformation.Properties["defaultProvider"];
throw new ConfigurationErrorsException(
SR.NoDefaultLoggingProviderFound(SectionName), property.Source, property.LineNumber);
}
return(defaultProvider);
}
// Throws a ConfigurationException (or a descendant) on failure.
private static LoggingProviderCollection LoadAndInitializeProviderCollection(LoggingSection section)
{
LoggingProviderCollection providerCollection = new LoggingProviderCollection();
foreach (ProviderSettings settings in section.Providers)
{
LoggingProviderBase loggingProvider = InstantiateLoggingProvider(settings);
providerCollection.Add(loggingProvider);
}
providerCollection.SetReadOnly();
return(providerCollection);
}