public void SaveConfiguration()

in apps/samplecode/automotive/apisamples/Microsoft.Dynamics.Automotive.Samples/helpercode/CrmServiceHelpers.cs [485:548]
60 lines of code
13 McCabe index (conditional complexity)

        public void SaveConfiguration(String pathname, Configuration config, bool append)
        {
            if (String.IsNullOrWhiteSpace(pathname)) throw new ArgumentNullException("pathname");
            if (config == null) throw new ArgumentNullException("config");
            // Target is the key with which associated credentials can be fetched from windows credentials manager.
            String target = config.ServerAddress + ":" + config.OrganizationName;
            if(null != config.Credentials)
            {
                switch(config.EndpointType)
                {
                    case AuthenticationProviderType.ActiveDirectory:
                        target = target + ":" + config.Credentials.Windows.ClientCredential.UserName;
                        break;
                    case AuthenticationProviderType.LiveId:
                    case AuthenticationProviderType.Federation:
                    case AuthenticationProviderType.OnlineFederation:
                        target = target + ":" + config.Credentials.UserName.UserName;
                        break;
                    default:
                        target = String.Empty;
                        break;
                }
            }            

            XElement configurationsFromFile = XElement.Load(pathname);
            XElement newConfig =
                new XElement("Configuration",
                    new XElement("ServerAddress", config.ServerAddress),
                    new XElement("OrganizationName", config.OrganizationName),
                    new XElement("DiscoveryUri",
                        (config.DiscoveryUri != null)
                        ? config.DiscoveryUri.OriginalString
                        : String.Empty),
                    new XElement("OrganizationUri",
                        (config.OrganizationUri != null)
                        ? config.OrganizationUri.OriginalString
                        : String.Empty),
                    new XElement("HomeRealmUri",
                        (config.HomeRealmUri != null)
                        ? config.HomeRealmUri.OriginalString
                        : String.Empty),
                    ParseOutCredentials(config.Credentials, config.EndpointType, target),
                    new XElement("EndpointType", config.EndpointType.ToString()),
                    new XElement("UserPrincipalName", 
                        (config.UserPrincipalName != null)
                        ? config.UserPrincipalName
                        : String.Empty)
                );

            if (append)
            {
                configurationsFromFile.Add(newConfig);
            }
            else
            {
                configurationsFromFile.ReplaceAll(newConfig);
            }

            using (XmlTextWriter writer = new XmlTextWriter(pathname, Encoding.UTF8))
            {
                writer.Formatting = Formatting.Indented;
                configurationsFromFile.Save(writer);
            }
        }