public WebResponseContentModel <List <RoleModel> > GetAllRoles()
        {
            WebResponseContentModel <List <RoleModel> > dt = new WebResponseContentModel <List <RoleModel> >();

            try
            {
                dt = GetResponseFromWebRequest <WebResponseContentModel <List <RoleModel> > >(WebServiceHelper.GetAllRoles(), "get");
            }
            catch (Exception ex)
            {
                dt.ValidationErrorAppSide = ConcatenateExceptionMessage(ex);
            }

            return(dt);
        }