private void ThisAddIn_Startup(object sender, System.EventArgs e)
        {
            #region create organisations for dropdown
            //Get Organisations from Textfile
            OrganisationHandler           OrgHandler           = new OrganisationHandler();
            ObservableCollection <string> OrganisationList     = new ObservableCollection <string>();
            ObservableCollection <string> OrganisationListMail = new ObservableCollection <string>();
            OrgHandler.createFile();
            OrganisationList     = OrgHandler.GetOrganisations();
            OrganisationListMail = OrgHandler.GetOrganisations();

            RibbonDropDown DropdownOrganisations      = Globals.Ribbons.RibbonMenu.dropDownOrg;
            RibbonDropDown DropdownOrganisationsEmail = Globals.Ribbons.RibbonMail.dropDownOrg;


            foreach (string Organisation in OrganisationList)
            {
                RibbonDropDownItem item = Globals.Factory.GetRibbonFactory().CreateRibbonDropDownItem();
                item.Label = Organisation;
                DropdownOrganisations.Items.Add(item);
            }

            foreach (string Organisation in OrganisationListMail)
            {
                RibbonDropDownItem item = Globals.Factory.GetRibbonFactory().CreateRibbonDropDownItem();
                item.Label = Organisation;
                DropdownOrganisationsEmail.Items.Add(item);
            }
            #endregion
        }