Microsoft.VisualStudio.Project.ProjectContainerNode.CreateNestedProjectNodes C# (CSharp) Method

        public virtual void CreateNestedProjectNodes()
        {
            // 1. Create a ProjectElement with the found item and then Instantiate a new Nested project with this ProjectElement.
            // 2. Link into the hierarchy.
            // Read subprojects from from msbuildmodel
            __VSCREATEPROJFLAGS creationFlags = __VSCREATEPROJFLAGS.CPF_NOTINSLNEXPLR | __VSCREATEPROJFLAGS.CPF_SILENT;

            if(this.IsNewProject)
            {
                creationFlags |= __VSCREATEPROJFLAGS.CPF_CLONEFILE;
            }
            else
            {
                creationFlags |= __VSCREATEPROJFLAGS.CPF_OPENFILE;
            }

            foreach (MSBuild.ProjectItem item in this.BuildProject.Items)
            {
                if(String.Equals(item.ItemType, ProjectFileConstants.SubProject, StringComparison.OrdinalIgnoreCase))
                {
                    this.nestedProjectElement = new ProjectElement(this, item, false);

                    if(!this.IsNewProject)
                    {
                        AddExistingNestedProject(null, creationFlags);
                    }
                    else
                    {
                        // If we are creating the subproject from a vstemplate/vsz file
                        bool isVsTemplate = Utilities.IsTemplateFile(GetProjectTemplatePath(null));
                        if(isVsTemplate)
                        {
                            RunVSTemplateWizard(null, true);
                        }
                        else
                        {
                            // We are cloning the specified project file
                            AddNestedProjectFromTemplate(null, creationFlags);
                        }
                    }
                }
            }

            this.nestedProjectElement = null;
        }