BrandingAddinWeb.Default.AddNewThemeOptionToSite C# (CSharp) Метод

        private void AddNewThemeOptionToSite(Web web, string themeName, string colorFilePath, string fontFilePath, string backGroundPath, string masterPageName)
        {
            // Let's get instance to the composite look gallery
            List themesOverviewList = web.GetCatalog(124);
            web.Context.Load(themesOverviewList);
            web.Context.ExecuteQuery();
            // Do not add duplicate, if the theme is already there
            if (!ThemeEntryExists(web, themesOverviewList, themeName))
            {
                // if web information is not available, load it
                if (!web.IsObjectPropertyInstantiated("ServerRelativeUrl"))
                {
                    web.Context.Load(web);
                    web.Context.ExecuteQuery();
                }
                // Let's create new theme entry. Notice that theme selection is not available from UI in personal sites, so this is just for consistency sake
                ListItemCreationInformation itemInfo = new ListItemCreationInformation();
                Microsoft.SharePoint.Client.ListItem item = themesOverviewList.AddItem(itemInfo);
                item["Name"] = themeName;
                item["Title"] = themeName;
                if (!string.IsNullOrEmpty(colorFilePath))
                {
                    item["ThemeUrl"] = URLCombine(web.ServerRelativeUrl, string.Format("/_catalogs/theme/15/{0}", System.IO.Path.GetFileName(colorFilePath)));
                }
                if (!string.IsNullOrEmpty(fontFilePath))
                {
                    item["FontSchemeUrl"] = URLCombine(web.ServerRelativeUrl, string.Format("/_catalogs/theme/15/{0}", System.IO.Path.GetFileName(fontFilePath)));
                }
                if (!string.IsNullOrEmpty(backGroundPath))
                {
                    item["ImageUrl"] = URLCombine(web.ServerRelativeUrl, string.Format("/_catalogs/theme/15/{0}", System.IO.Path.GetFileName(backGroundPath)));
                }
                // we use seattle master if anythign else is not set
                if (string.IsNullOrEmpty(masterPageName))
                {
                    item["MasterPageUrl"] = URLCombine(web.ServerRelativeUrl, "/_catalogs/masterpage/seattle.master");
                }
                else
                {
                    item["MasterPageUrl"] = URLCombine(web.ServerRelativeUrl, string.Format("/_catalogs/masterpage/{0}", Path.GetFileName(masterPageName)));
                }

                item["DisplayOrder"] = 11;
                item.Update();
                web.Context.ExecuteQuery();
            }
        }