c#中对文件的操作小结

 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");
   }
  }