VS自带的SQL server修改密码并连接使用

using System;
using System.Data.SqlClient;
​
namespace LocalDBExample
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Server=(localdb)\mssqlLocalDB;Database=YourDatabaseName;User Id=sa;Password=YourPassword;";
​
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();
                Console.WriteLine("Connected to the database successfully!");
​
                // 在此处执行您的数据库操作
​
                connection.Close();
            }
        }
    }
}