System.Configuration.BaseConfigurationRecord.LoadConfigSource C# (CSharp) Метод

        private ConfigXmlReader LoadConfigSource(string name, SectionXmlInfo sectionXmlInfo) {
            string configSourceStreamName = sectionXmlInfo.ConfigSourceStreamName;
            
            try {
                using (Impersonate()) {
                    using (Stream stream = Host.OpenStreamForRead(configSourceStreamName)) {
                        if (stream == null) {
                            throw new ConfigurationErrorsException(
                                    SR.GetString(SR.Config_cannot_open_config_source, sectionXmlInfo.ConfigSource),
                                    sectionXmlInfo);
                        }

                        using (XmlUtil xmlUtil = new XmlUtil(stream, configSourceStreamName, true)) {
                            if (xmlUtil.Reader.Name != name) {
                                throw new ConfigurationErrorsException(SR.GetString(SR.Config_source_file_format), xmlUtil);
                            }

                            // Check for protectionProvider
                            string protectionProviderAttribute = xmlUtil.Reader.GetAttribute(KEYWORD_PROTECTION_PROVIDER);
                            if (protectionProviderAttribute != null) {
                                if (xmlUtil.Reader.AttributeCount != 1) {
                                    // Error: elements with protectionProvider should not have other attributes
                                    throw new ConfigurationErrorsException(SR.GetString(SR.Protection_provider_syntax_error), xmlUtil);
                                }
        
                                sectionXmlInfo.ProtectionProviderName = ValidateProtectionProviderAttribute(protectionProviderAttribute, xmlUtil);
                            }
                            
                            int lineOffset = xmlUtil.Reader.LineNumber;
                            string rawXml = xmlUtil.CopySection();

                            // Detect if there is any XML left over after the section
                            while (!xmlUtil.Reader.EOF) {
                                XmlNodeType t = xmlUtil.Reader.NodeType;
                                if (t != XmlNodeType.Comment) {
                                    throw new ConfigurationErrorsException(SR.GetString(SR.Config_source_file_format), xmlUtil);
                                }

                                xmlUtil.Reader.Read();
                            }

                            ConfigXmlReader section = new ConfigXmlReader(rawXml, configSourceStreamName, lineOffset);
                            return section;
                        }
                    }
                }
            }
            catch {
                // Don't allow frames up the stack to run exception filters while impersonated.
                throw;
            }
        }