C# 4 and .NET 4

802 ❘ ChaPTer 29 mAnipulAtinG files And the reGistry
figure 29-15
From here, you can see that these message boxes provide details about three entirely different drives. The
first, drive C:\, is my hard drive, as the message box shows its drive type as Fixed. The second drive, drive
D:\, is my CD/DVD drive. The third drive, drive F:\, is my USB pen and is labeled with a Removable
drive type.
file seCuriTy
When the .NET Framework 1.0/1.1 was first introduced, it didn’t come with a way to easily access and work
access control lists (ACLs) for files, directories, and registry keys. To do such things at that time usually
meant some work with COM interop, thus also requiring a more advanced programming knowledge of
working with ACLs.
This has considerably changed after the release of the .NET Framework 2.0 came out. This made the
process of working with ACLs considerably easier with a namespace — System.Security.AccessControl.
With this namespace, it is now possible to manipulate security settings for files, registry keys, network
shares, Active Directory objects, and more.
reading aCls from a file
For an example of working with System.Security.AccessControl, this section looks at working with the
ACLs for both files and directories. It starts by looking at how you would review the ACLs for a particular
file. This example is accomplished in a console application and is illustrated here:
using System;
using System.IO;
using System.Security.AccessControl;
using System.Security.Principal;
namespace ReadingACLs
{
internal class Program
{
private static string myFilePath;
private static void Main()
{
Console.Write("Provide full file path: ");
myFilePath = Console.ReadLine();
try
{
using (FileStream myFile =
new FileStream(myFilePath, FileMode.Open, FileAccess.Read))
www.it-ebooks.info