using System;
using System.IO;

public class IOExample
{
  static void Main() {   
    FileStream fs;
    StreamReader srIn;

    try {
      fs = new FileStream("practice.txt", FileMode.Open );
      srIn = new StreamReader(fs);

      string line = srIn.ReadLine();

      Console.WriteLine("line = "+line);
      srIn.Close();
    } catch (IOException ioe) {
      Console.WriteLine("IOException occurred: "+ioe.Message);
    }
  }
}

           
          

   


using System;
using System.IO;

public class FileReadStrings {
  public static void Main( ) {
    String line;
    StreamReader f = new StreamReader("test.data");        
    while((line=f.ReadLine()) != null)                           
      Console.WriteLine(line);
    f.Close(); 
  }
}

//File: test.data
/*
4665 Street|Toronto|ON|90048
*/
           
          

   

using System;
using System.IO;

public class FileReadAddresses {
  public static void Main( ) {
    String line;
    String street, city, state, zip;
    StreamReader f = new StreamReader("test.data");
    while ((line=f.ReadLine())!= null){
      String[] strings = line.Split(new char[]{'|'});
      if (strings.Length == 4) {
        street = strings[0];
        city = strings[1];
        state = strings[2];
        zip = strings[3];
        Console.WriteLine(street); 
        Console.WriteLine(city);
        Console.WriteLine(state);
        Console.WriteLine(zip);
      }
    }
    f.Close();
  }
}    

//File: test.data
/*
4665 Street|Toronto|ON|90048
*/

           
          

   

using System;
using System.IO;
using System.Text;

class MainClass {
    static void Main() {
        using (FileStream fs = new FileStream("test.txt", FileMode.Create)) {
            using (StreamWriter w = new StreamWriter(fs, Encoding.UTF8)) {
                w.WriteLine(124.23M);
                w.WriteLine("Test string");
                w.WriteLine('!');
            }
        }
        Console.WriteLine("Press Enter to read the information.");
        Console.ReadLine();
        // Open the file in read-only mode.
        using (FileStream fs = new FileStream("test.txt", FileMode.Open)) {
            using (StreamReader r = new StreamReader(fs, Encoding.UTF8)) {
                // Read the data and convert it to the appropriate data type.
                Console.WriteLine(Decimal.Parse(r.ReadLine()));
                Console.WriteLine(r.ReadLine());
                Console.WriteLine(Char.Parse(r.ReadLine()));
            }
        }
    }
}
           
          

   


using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Permissions;


class Program {
    static void Main(string[] args) {
        MyClass.Method();
    }
}

[FileIOPermission(SecurityAction.Assert, Read = "C:/")]
class MyClass {
    public static void Method() {
        // implementation goes here
    }
}

           
          

   
 

using System;
using System.IO;

class MainClass {
    static void Main() {
        using (FileStream fs = new FileStream("test.bin", FileMode.Create)) {
            using (BinaryWriter w = new BinaryWriter(fs)) {
                w.Write(124.23M);
                w.Write("Tstring");
                w.Write("Tstring 2");
                w.Write('!');
            }
        }
        Console.WriteLine("Press Enter to read the information.");
        Console.ReadLine();

        using (FileStream fs = new FileStream("test.bin", FileMode.Open)) {
            using (StreamReader sr = new StreamReader(fs)) {
                Console.WriteLine(sr.ReadToEnd());
                Console.WriteLine();

                fs.Position = 0;
                using (BinaryReader br = new BinaryReader(fs)) {
                    Console.WriteLine(br.ReadDecimal());
                    Console.WriteLine(br.ReadString());
                    Console.WriteLine(br.ReadString());
                    Console.WriteLine(br.ReadChar());
                }
            }
        }
    }
}

    

   

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

// Status.cs -- Uses methods in the File class to check the status of a file.
//
//              Compile this program with the following command line
//                  C:>csc Status.cs
using System;
using System.IO;

namespace nsStreams
{
    public class Status
    {
        static public void Main (string [] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine ("Please enter a file name");
                return;
            }
            if (!File.Exists (args[0]))
            {
                Console.WriteLine (args[0] + " does not exist");
                return;
            }
            DateTime created = File.GetCreationTime (args[0]);
            DateTime accessed = File.GetLastAccessTime (args[0]);
            DateTime written = File.GetLastWriteTime (args[0]);
            Console.WriteLine ("File " + args[0] + ":");
            string str = created.ToString();
            int index = str.IndexOf (" ");
            Console.WriteLine ("	Created on " + str.Substring (0, index) + " at " + str.Substring (index + 1));
            str = accessed.ToString();
            index = str.IndexOf (" ");
            Console.WriteLine ("	Last accessed on " + str.Substring (0, index) + " at " + str.Substring (index + 1));
            str = written.ToString();
            index = str.IndexOf (" ");
            Console.WriteLine ("	Last written on " + str.Substring (0, index) + " at " + str.Substring (index + 1));
        }
    }
}