1、建立一个文本文件 public class FileClass { public static void Main() { WriteToFile(); } static void WriteToFile() { StreamWriter SW; SW=File.CreateText("c:\MyTextFile.txt"); SW.WriteLine("God is greatest of them all"); SW.WriteLine("This is second line"); SW.Close(); Console.WriteLine("File Created SucacessFully"); } }

2、读文件 public class FileClass { public static void Main() { ReadFromFile("c:\MyTextFile.txt"); } static void ReadFromFile(string filename) { StreamReader SR; string S; SR=File.OpenText(filename); S=SR.ReadLine(); while(S!=null) { Console.WriteLine(S); S=SR.ReadLine(); } SR.Close(); } }

3、追加操作 public class FileClass { public static void Main() { AppendToFile(); } static void AppendToFile() { StreamWriter SW; SW=File.AppendText("C:\MyTextFile.txt"); SW.WriteLine("This Line Is Appended"); SW.Close(); Console.WriteLine("Text Appended Successfully"); } }