C#sql 데이터베이스에 간단하게 연결하는 방법

using System;
using System.Collections.Generic;
using System.Text;
// 
using System.Data;
using System.Data.SqlClient;
using worddic;
namespace testDB
{
  class Program
  {
    static void Main(string[] args)
    {
      //char[] array = new char[2] ;
      string [] a = new string[2];
      FileOp words = new FileOp();
      words.openfile("worddic.txt");
      words.getwords(ref a);
      /* Console.WriteLine(" Data Source：");
      string data_source = Console.ReadLine();
      Console.WriteLine(" Initial Catalog：");
      string initial_catalog = Console.ReadLine();
      Console.WriteLine(" user id：");
      string user_id = Console.ReadLine();
      Console.WriteLine(" pass word：");
      string pword = Console.ReadLine();
      // 
      string strConn ="Data Source="+data_source+";Initial Catalog="+initial_catalog+";User ID="+user_id+";Password="+pword+"";//YourPwd sa 
      */
      string strConn = "Data Source=HYPER-V-WIN2003\\SQLSRV2005;Initial Catalog=Mytest;User ID=sa;Password=sa";
      SqlConnection conn = null;
      SqlCommand sqlCmd = null;
      try
      {
        // connection 
        conn = new SqlConnection(strConn);
        // 
        conn.Open();
        // Transac Sql 
        sqlCmd = conn.CreateCommand();
        // 
        //sqlCmd.CommandText = "create table wordlist(wrongwords varchar(30),rightwords varchar(30),sign char(20),)";
        //sqlCmd.ExecuteScalar();
        while (a[0] != null) {
          sqlCmd.CommandText ="insert into wordlist(wrongwords,rightwords,sign) values('" + a[0] + "','" + a[1] + "',1 )";
          sqlCmd.ExecuteScalar();
          a[0] = null;
          a[1] = null;
          words.getwords(ref a);
        }
        words.fileclose();
        Console.WriteLine();
        // 
      }
      catch (SqlException e)
      {
        Console.WriteLine(e.Message);
      }
      finally
      {
        conn.Close();
      }
      Console.WriteLine(" ， ");
      Console.ReadKey();
    }
  }
}