string strConn = @"Data Source=.;Initial Catalog=DEMO2;User Id=sa;Password=Auto@sql;";            string sqlGetData = "SELECT *FROM dbo.T1";            SqlParameter[] parasGetData = new SqlParameter[]{};            DataSet ds = SqlHelper.ExecuteDataset(strConn, CommandType.Text, sqlGetData, parasGetData);            string sqlInsertData = @"INSERT INTO dbo.T2(ID) SELECT ID FROM @vt as T";            SqlParameter dtPara = new SqlParameter("@vt", ds.Tables[0]);            dtPara.SqlDbType= SqlDbType.Structured;            dtPara.TypeName = "dbo.udt_T1";            SqlParameter[] parasInsertData = new SqlParameter[] { dtPara };            SqlHelper.ExecuteNonQuery(strConn, CommandType.Text, sqlInsertData, parasInsertData);            Console.WriteLine("ok");            Console.ReadLine();