Microsoft.PackageManagement.NuGetProvider.NuGetRequest.RemovePackageSource C# (CSharp) Method

        internal void RemovePackageSource(string id)
        {
            Debug(Resources.Messages.DebugInfoCallMethod3, "NuGetRequest", "RemovePackageSource", id);
            var config = Config;
            if (config == null) {
                return;
            }

            try {

                XElement configuration = config.ElementsNoNamespace("configuration").FirstOrDefault();
                if (configuration == null)
                {
                    return;
                }

                XElement packageSources = configuration.ElementsNoNamespace("packageSources").FirstOrDefault();
                if (packageSources == null)
                {
                    return;
                }

                var nodes = packageSources.Elements("add");
                if (nodes == null) {
                    return;
                }

                foreach (XElement node in nodes) {

                    if (node.Attribute("key") != null && String.Equals(node.Attribute("key").Value, id, StringComparison.OrdinalIgnoreCase)) {
                        // remove itself
                        node.Remove();
                        Config = config;
                        Verbose(Resources.Messages.RemovedPackageSource, id);
                        break;
                    }

                }

                if (_registeredPackageSources.ContainsKey(id))
                {
                    _registeredPackageSources.Remove(id);
                }

                if (_checkedUnregisteredPackageSources.ContainsKey(id))
                {
                    _checkedUnregisteredPackageSources.Remove(id);
                }

                //var source = config.SelectNodes("/configuration/packageSources/add").Cast<XmlNode>().FirstOrDefault(node => String.Equals(node.Attributes["key"].Value, id, StringComparison.CurrentCultureIgnoreCase));

                //if (source != null)
                //{
                //    source.ParentNode.RemoveChild(source);
                //    Config = config;
                //    Verbose(Resources.Messages.RemovedPackageSource, id);
                //}
            } catch (Exception ex) {
                ex.Dump(this);
            }
        }

        /// <summary>
        /// Removes/Unregisters a package source
        /// </summary>
        /// <param name="name">The name or location of a package source to remove.</param>
        /// <param name="request">An object passed in from the PackageManagement that contains functions that can be used to interact with its Provider</param> 
        public void RemovePackageSource(string name, NuGetRequest request)
        {
            if (request == null){
                throw new ArgumentNullException("request");
            }
            request.Debug(Resources.Messages.DebugInfoCallMethod, PackageProviderName, "RemovePackageSource");

            var src = request.FindRegisteredSource(name);
            if (src == null)
            {
                request.Warning(Constants.Messages.UnableToResolveSource, name);
                return;
            }

            request.RemovePackageSource(src.Name);
            request.YieldPackageSource(src.Name, src.Location, src.Trusted, false, src.IsValidated);
        }