(ORD C# - 2021 Release 1) How to save TemplateLibrary after added TemplateDefinition?

Hello.

I am writing an addin program using C# ORD SDK and I am trying to add new TemplateDefinition to TemplateLibrary.

So I loaded default TemplateLibrary and add new TemplateDefinition to the TemplateLibrary loaded.

But I don't know how to save TemplateLibrary. 

Is there a way to save TemplateLibrary?

Here is my code.

        protected override void OnPostInstall()
        {
            base.OnPostInstall();

            // load default template library
            string strlibPath = TemplateLibrary.GetDefaultTemplateLibraryPath();
            var templateLibrary = TemplateLibrary.Load(strlibPath);
            
            // root cate
            var rootCate = templateLibrary.RootCategory;

            // create new TemplateDefination
            var newTemp = new TemplateDefinition("fff");

            // points
            TemplatePointConstraint cl_c1 = new TemplatePointConstraint(ConstraintType.None, 0, "");
            TemplatePointConstraint cl_c2 = new TemplatePointConstraint(ConstraintType.None, 0, "");
            TemplatePoint cl = new TemplatePoint("cl", "cl_f", "cl_s", false, 0, 0, 0, "cl_sc", "cl_scm", 2.5, cl_c1, cl_c2);
            

            TemplatePointConstraint p1_c1 = new TemplatePointConstraint(ConstraintType.Slope, 2, "cl");
            TemplatePointConstraint p1_c2 = new TemplatePointConstraint(ConstraintType.Horizontal, -10, "cl");
            TemplatePoint p1 = new TemplatePoint("p1", "p1_f", "p1_s", false, 0, 0, 0, "p1_sc", "p1_scm", 2.5, p1_c1, p1_c2);

            newTemp.AddPoint(cl);
            newTemp.AddPoint(p1);

            // component
            var comp = new TemplateComponent("paveL", "", TemplateComponentType.Normal, true, "", "");
            newTemp.AddComponent(comp);
            comp.AddVertex(new TemplateVertex(p1, 0));
            comp.AddVertex(new TemplateVertex(cl, 0));

            // add to new TemplateDefinition
            rootCate.AddTemplate(newTemp);

            // Question : how to save the templateLibrary as strlibPath?

            ExitTool();
            
        }

Thank you.