.net 连接数据库报错“连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，实在找不到原因请先Goog” 返回

SqlSugar 老数据

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环境：window 10

oracle 11g

.net 5

问题使用.net 5 调用数据库sqlsugar 报错

SqlSugarException: English Message : Connection open error . Exception has been thrown by the target of an invocation. Chinese Message : 连接数据库过程中发生错误，检查服务器是否正常连接字符串是否正确，实在找不到原因请先Google错误信息：Exception has been thrown by the target of an invocation..

例子：

SqlSugarClient db = new SqlSugarClient(new ConnectionConfig()

{

ConnectionString = "Data Source=222.222.222.1/testdb;User ID=**;Password=**;",

DbType = DbType.Oracle

IsAutoCloseConnection = true, //自动关闭数据库连接

});

var dt= db.Ado.SqlQuery<DateTime>("select sysdate from dual").FirstOrDefault();

使用.net 3.1 调用数据库正常