ExcelDna.Integration.DnaLibrary.LoadCustomUI C# (CSharp) Method

        internal void LoadCustomUI()
        {
            bool uiLoaded = false;
            if (ExcelDnaUtil.ExcelVersion >= 12.0)
            {
                // Load ComAddIns
                foreach (AssemblyLoader.ExcelAddInInfo addIn in _addIns)
                {
                    if (addIn.IsCustomUI)
                    {
                        // Load ExcelRibbon classes
                        ExcelRibbon excelRibbon = addIn.Instance as ExcelRibbon;
                        excelRibbon.DnaLibrary = addIn.ParentDnaLibrary;
                        ExcelComAddInHelper.LoadComAddIn(excelRibbon);
                        uiLoaded = true;
                    }
                }

                // CONSIDER: Really not sure if this is a good idea - seems to interfere with unloading somehow.
                //if (uiLoaded == false && CustomUIs != null)
                //{
                //    // Check whether we should add an empty ExcelCustomUI instance to load a Ribbon interface?
                //    bool loadEmptyAddIn = false;
                //    if (CustomUIs != null)
                //    {
                //        foreach (XmlNode xmlCustomUI in CustomUIs)
                //        {
                //            if (xmlCustomUI.LocalName == "customUI" &&
                //                (xmlCustomUI.NamespaceURI == ExcelRibbon.NamespaceCustomUI2007 ||
                //                 (ExcelDnaUtil.ExcelVersion >= 14.0 &&
                //                  xmlCustomUI.NamespaceURI == ExcelRibbon.NamespaceCustomUI2010)))
                //            {
                //                loadEmptyAddIn = true;
                //            }
                //            if (loadEmptyAddIn)
                //            {
                //                // There will be Ribbon xml to load. Make a temp add-in and load it.
                //                ExcelRibbon customUI = new ExcelRibbon();
                //                customUI.DnaLibrary = this;
                //                ExcelComAddInHelper.LoadComAddIn(customUI);
                //                uiLoaded = true;
                //            }
                //        }
                //    }
                //}
            }

            // should we load CommandBars?
            if (uiLoaded == false && CustomUIs != null)
            {
                foreach (XmlNode xmlCustomUI in CustomUIs)
                {
                    if (xmlCustomUI.LocalName == "commandBars")
                    {
                        ExcelCommandBarUtil.LoadCommandBars(xmlCustomUI, this.GetImage);
                    }
                }
            }
        }