using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

namespace ConsoleApplication2

{

    class Class2

    {

        public const string path = "C:/Users/dajun/Desktop/C#/xdj/gadata.txt";

        static void Main(string[] args)

        {

            //string path = "C:/Users/dajun/Desktop/C#/xdj/gadata.txt";

            try

            {

                //FileStream aFile = new FileStream(path, FileMode.Open);// 方式一

                //StreamReader sr = new StreamReader(aFile);

                StreamReader sr = new StreamReader(path); //方式二

                string strLine = sr.ReadLine();

                //Read data in line by line

                while (strLine != null)

                {

                    Console.WriteLine(strLine);

                    strLine = sr.ReadLine();

                }

                sr.Close();

            }

            catch (IOException ex)

            {

                Console.WriteLine("An IOException has been thrown!");

                Console.WriteLine(ex.ToString());

                Console.ReadLine();

                return;

            }

        }

    }

}

                int nChar;

                nChar = sr.Read();

                while (nChar != -)

                {

                    //Console.Write(nChar);

                    Console.Write(Convert.ToChar(nChar));

                    //Console.WriteLine("{0}",nChar);

                    nChar = sr.Read();

                }

                sr.Close();