代码：string sqlconn = PulicClass.PublicClass.DBServer;
            SqlConnection conn = new SqlConnection();
            conn.ConnectionString = sqlconn;
            
                if (conn.State != ConnectionState.Open)
                {
                    conn.Open();
                }
           
            return conn;
在conn.Open();这句报错，未处理SqlException；去监视conn,查看ServerVersion属性   “conn.ServerVersion”引发了“System.InvalidOperationException”类型的异常    string {System.InvalidOperationException}
我的连接串是："Server=10.3.33.253;database=3Yue3;User ID=sa;Password=123;Persist Security Info=True;"有没有问题啊？

自己顶下。。