public IEnumerable <Movie> ToList() { using (var conn = new SqlConnection(_ConnectionString)) { conn.Open(); var helper = new DbHelperSql(conn); string sql = @" select ID, Genre, Price, ReleaseDate, Title from Movie "; var dt = helper.ExecDataTableSql(sql); var list = dt.AsEnumerable().Select(dr => new Movie() { Id = (int)dr["ID"], Genre = (string)dr["Genre"], Price = (decimal)dr["Price"], ReleaseDate = (DateTime)dr["ReleaseDate"], Title = (string)dr["Title"], }); return(list); } }