将FileStream类型转换为byte

1using System;
2using System.IO;
3using System.IO.Compression;
4
5public class DeflateTest
6{
//读filename到byte[]
 8    public static byte[] ReadFile(string fileName)
9    {
10        FileStream fs = new FileStream(fileName,FileMode.OpenOrCreate);
11        byte[] buffer = new byte[fs.Length];
12        try
13        {
14            fs.Read(buffer, 0, buffer.Length);
15            fs.Seek(0, SeekOrigin.Begin);
16            return buffer;
17        }
18        catch
19        {
20            return buffer;
21        }
22        finally
23        {
24            if (fs != null)
25                fs.Close();
26        }
27    }

//写byte[]到fileName
29    public static bool WriteFile(byte[] pReadByte, string fileName)
30    {
31        FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate);
32        try
33        {
34            fs.Write(pReadByte, 0, pReadByte.Length);
35        }
36        catch
37        {
38            return false;
39        }
40        finally
41        {
42            if (fs != null)
43                fs.Close();
44        }
45        return true;
46    }
47
48
49    public static void Main(string[] args)
50    {
51        byte[] b = ReadFile(@"d:/a.jpg");
52        if (WriteFile(b, @"d:/a3.jpg"))
53        {
54            Console.WriteLine("Success");
55        }
56        else
57        {
58            Console.WriteLine("Sorry");
59        }
60        Console.ReadLine();
61    }