那个C#高手教我练SQL2005数据库（WINFORM)

我试了，有错误，没学过C#

QQ403202106

SqlConnection conn = new SqlConnection("server=localhost;database=数据库名;user=sa;pwd=密码");

use System.Data.SqlClient;

SqlConnection conn = new SqlConnection();

conn.ConnectionString = "Server=localhost;Database=数据库名;User ID=sa;Password=密码; Trusted_Connection=False;";

conn.Open();