public override void Register()

in vsintegration/src/FSharp.ProjectSystem.Base/RegistrationAttributes/WAProvideProjectFactoryAttribute.cs [183:235]
41 lines of code
17 McCabe index (conditional complexity)

        public override void Register(RegistrationContext context)
        {
            //context.Log.WriteLine(SR.GetString(SR.Reg_NotifyProjectFactory, FactoryType.Name));

            using (Key projectKey = context.CreateKey(ProjectRegKey))
            {
                projectKey.SetValue(string.Empty, Name);
                if (_displayName != null)
                    projectKey.SetValue("DisplayName", _displayName);
                if (_displayProjectFileExtensions != null)
                    projectKey.SetValue("DisplayProjectFileExtensions", _displayProjectFileExtensions);
                projectKey.SetValue("Package", context.ComponentType.GUID.ToString("B"));
                if (_defaultProjectExtension != null)
                    projectKey.SetValue("DefaultProjectExtension", _defaultProjectExtension);
                if (_possibleProjectExtensions != null)
                    projectKey.SetValue("PossibleProjectExtensions", _possibleProjectExtensions);
                if (_projectTemplatesDirectory != null)
                {
                    if (!System.IO.Path.IsPathRooted(_projectTemplatesDirectory))
                    {
                        // If path is not rooted, make it relative to package path
                        _projectTemplatesDirectory = System.IO.Path.Combine(context.ComponentPath, _projectTemplatesDirectory);
                    }
                    projectKey.SetValue("ProjectTemplatesDir", context.EscapePath(_projectTemplatesDirectory));
                }

                // VsTemplate Specific Keys
                //
                if (_languageVsTemplate != null)
                    projectKey.SetValue("Language(VsTemplate)", _languageVsTemplate);

                if (_showOnlySpecifiedTemplatesVsTemplate || _templateGroupIDsVsTemplate != null || _templateIDsVsTemplate != null)
                {
                    int showOnlySpecifiedTemplatesVsTemplate = _showOnlySpecifiedTemplatesVsTemplate ? 1 : 0;
                    projectKey.SetValue("ShowOnlySpecifiedTemplates(VsTemplate)", showOnlySpecifiedTemplatesVsTemplate);
                }

                if (_templateGroupIDsVsTemplate != null)
                    projectKey.SetValue("TemplateGroupIDs(VsTemplate)", _templateGroupIDsVsTemplate);

                if (_templateIDsVsTemplate != null)
                    projectKey.SetValue("TemplateIDs(VsTemplate)", _templateIDsVsTemplate);

                if (_displayProjectTypeVsTemplate != null)
                    projectKey.SetValue("DisplayProjectType(VsTemplate)", _displayProjectTypeVsTemplate);

                if (_projectSubTypeVsTemplate != null)
                    projectKey.SetValue("ProjectSubType(VsTemplate)", _projectSubTypeVsTemplate);

                if (_newProjectRequireNewFolderVsTemplate)
                    projectKey.SetValue("NewProjectRequireNewFolder(VsTemplate)", (int)1);
            }
        }