C# IO操作磁盘上的txt

using System.IO;

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//写入并导出到磁盘             StreamWriter sw = new StreamWriter(@"H:\text.txt");             sw.WriteLine("ABC");             sw.WriteLine("测试");             sw.WriteLine(123);             sw.Close();               //读取txt             StreamReader sr = new StreamReader(@"H:\text.txt");             Response.Write(sr.ReadLine() + "</br>");             Response.Write(sr.ReadLine() + "</br>");             Response.Write(sr.ReadLine() + "</br>");