C#简单的连接本地SQL Server

代码展示：

    public partial class Form1 : Form
    {
        string connStr = "Server=localhost;Database=MyFirstDB;Uid=sa;Pwd=123456";
        public Form1()
        {
            InitializeComponent();
            SqlConnection connection = new SqlConnection(connStr);
            connection.Open();
            MessageBox.Show(connection.State.ToString());
            connection.Close();
        }
    }

---

连接成功的话会弹出一个提示：open