C#读取txt文本文件的几种方式

1.按行读取：每次读取一行内容，即遇到回车键才会停止。

public void readfile(string filepath)
         {
             if (!File.Exists(filepath))
             {
                 MessageBox.Show(" file not exits !");
                 return;
             }
             string[] result ;
             FileStream fs = new FileStream(filepath, FileMode.Open);
             using (StreamReader sr = new StreamReader(fs, Encoding.Default))
             {
                 List<string> list = new List<string>();
                 string input;
                     while (!sr.EndOfStream)
                     {
                         input= sr.ReadLine().ToString();
                  
                      }
                } 
            
                 sr.Close();
             }

2. 理论上任意形式的读取方式

using System;

public class SplitTest {
    public static void Main() {

        string words = "This is a list of words, with: a bit of punctuation" +
                       "\tand a tab character.";

        string [] split = words.Split(new Char [] {' ', ',', '.', ':', '\t' });

        foreach (string s in split) {

            if (s.Trim() != "")
                Console.WriteLine(s);
        }
    }
}
// The example displays the following output to the console:
//       This
//       is
//       a
//       list
//       of
//       words
//       with
//       a
//       bit
//       of
//       punctuation
//       and
//       a
//       tab
//       character