System.Configuration.ConfigurationManager.EnsureConfigurationSystem C# (CSharp) Метод

        private static void EnsureConfigurationSystem() {
            // If a configuration system has not yet been set, 
            // create the DefaultConfigurationSystem for exe's.
            lock (s_initLock) {
                if (s_initState < InitState.Usable) {
                    s_initState = InitState.Started;
                    try {
                        try {
                            // Create the system, but let it initialize itself
                            // when GetConfig is called, so that it can handle its
                            // own re-entrancy issues during initialization.
                            // When initialization is complete, the DefaultConfigurationSystem
                            // will call CompleteConfigInit to mark initialization as
                            // having completed.
                            // Note: the ClientConfigurationSystem has a 2-stage initialization,
                            // and that's why s_initState isn't set to InitState.Completed yet.
                            s_configSystem = new ClientConfigurationSystem();
                            s_initState = InitState.Usable;
                        }
                        catch (Exception e) {
                            s_initError = new ConfigurationErrorsException(SR.GetString(SR.Config_client_config_init_error), e);
                            throw s_initError;
                        }
                        catch {
                            s_initError = new ConfigurationErrorsException(SR.GetString(SR.Config_client_config_init_error));
                            throw s_initError;
                        }
                    }
                    catch {
                        s_initState = InitState.Completed;
                        throw;
                    }
                }
            }
        }