据的 http://www.freesqldatabase.com/mssql/

他们即将推出的MS SQL Server连接，也就是说，它们不提供它现在。什么是你想连接到？如果它是MySQL比的SqlConnection是行不通的。

they will launch MS SQL Server connection soon, i.e. they don't provide it now. What are you trying to connect to? If it is MySql than Sqlconnection would not work.