increase. delete. change

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.SqlClient;

namespace ExecuteNoQuery
{
class Program
{
static void Main(string[] args)
{
string cs = “Data Source=.;Initial Catalog=yi;Persist Security Info=True;User ID=sa;Password=cnm.040513”;
SqlConnection conn =new SqlConnection(cs);

        //打开连接对象
        conn.Open();

        //主要操作
        string sql="insert into sanguo values(12,'小乔',80,'其它')";

        //实例化一个执法者
        SqlCommand cmd = new SqlCommand(sql,conn);

        //执法者调用增删改方法
        int n = cmd.ExecuteNonQuery();
        Console.WriteLine("受影响的行数是："+n);

        //关闭连接对象
        conn.Close();

        //暂停
        Console.ReadKey();
    }
}

}