C#数据库编程这里出什么问题了，可以调试，不可以运行！

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string connStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Master;Data Source = (local) ";
            SqlConnection conn = new SqlConnection(connStr);
            conn.Open();
            SqlCommand cmd = conn.CreateCommand();
            cmd.CommandText = "Select ID,LastName,FirstName,City from student";
            SqlDataReader reader = cmd.ExecuteReader();
            string output;
            while(reader.Read())
            {
                output = string.Format("ID{0}\t的FirstName{1}，LastName{2},Coty{3}", reader.GetString(3), reader.GetString(2), reader.GetString(1), reader.GetString(0));
                Console.WriteLine(output);
            }
            reader.Close();
            conn.Close();
        }
    }
}

追问：还是不行，为什么？

我这是连接SQL server 数据库的！

WHY？

答案：string connStr = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=Master;Data Source = (local) ";
改为

string connStr = "server=.;database=Master;Integrated Security=SSPI;Persist Security Info=False;";

太强了,网吧里面编程!!你牛B啊```