这是原来的连接字符串：Provider=SQLOLEDB.1;Password=abc;Persist Security Info=True;User ID=ab;Initial Catalog=efg;Data Source=172.18.1.186
把它换成C#连接字符串怎么写？
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string connectionString = "server=172.18.1.186;database=Northwind;uid=sa;pwd=sa";
SqlConnection mySqlConnection = new SqlConnection(connectionString);
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Server=172.18.1.186;Database=efg;Uid=ab;Pwd=abc
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1.检查数据库用户名密码是否正确.
2.查看SQL Server是否已配置为允许远程连接