已经知道文本中第几行，想用streamwriter把这行删除掉 不知道如何实现

Question

已经知道文本中第几行，想用streamwriter把这行删除掉 不知道如何实现可以说是把这行删除掉 不留空格 不留空行  完全删除掉。请教

Answer 1

ReadLine()一行一行读，然后跟过那一行，再写回去

Answer 2

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;namespace CA1
{
    class Program
    {
        static void Main(string[] args)
        {
            string file = "sample.txt";//文件名
            string filecontent = string.Empty;
            int line = 2;//不需要的行
            int curline = 1;
            using (StreamReader sr = new StreamReader(file, Encoding.GetEncoding("GB2312")))
            {
                while (sr.Peek() != -1)
                {
                    string tmp = sr.ReadLine();
                    if (line != curline)
                    {
                        if (filecontent != string.Empty) filecontent += "\r\n";
                        filecontent += tmp;
                    }
                    curline++;
                }
            }
            //写回
            using (StreamWriter sw = new StreamWriter(file, false, Encoding.GetEncoding("GB2312")))
            {
                sw.Write(filecontent);
            }
            Console.ReadLine();
        }
    }
}

Answer 3

            StreamReader sd = File.OpenText("1.txt");
            string savestr= sd.ReadToEnd();
            sd.Close();
            int foundS1 = name.IndexOf(" ");
            int foundS2 = name.IndexOf(" ", foundS1 + 1);            if (foundS1 != foundS2 && foundS1 >= 0)
            {                name = name.Remove(foundS1 + 1, foundS2 - foundS1);
                
            }            StreamWriter sw = File.CreateText("1.txt");
            sw.WriteLine(savestr);
            sw.Close();这是删除空格操作 自己写的 很容易看懂