C# 数据回滚

public  int GetExecteQuery(string strAddSql, string strUpdateSql, string strDelSql)
        {
            SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["GPSP_SQL"]);//实例化数据连接
            //SqlConnection conn = new SqlConnection(CONN_STRING);
            conn.Open();
            SqlCommand command = conn.CreateCommand();

            SqlTransaction transaction = null;
            transaction = conn.BeginTransaction();
            command.Connection = conn;
            command.Transaction = transaction;
            int count = ;

            try
            {
                if (strAddSql != "")
                {
                    command.CommandText = “insert into A.....”;
                    command.ExecuteNonQuery();
                }
                if (strUpdateSql != "")
                {
                    command.CommandText = “insert into B.....”;
                    count = command.ExecuteNonQuery();
                }
                if (strDelSql != "")
                {
                    command.CommandText = “insert into C.....”;
                    count = command.ExecuteNonQuery();
                }
                transaction.Commit();
            }
            catch
            {

                transaction.Rollback();
            }

            return count;
        }