New features in version 2.0 with common classes in the. NET Framework

In the last article "browsing." NET Framework 2.0 type library new common features in the article I mainly listed a few new common main parts, this article as a summary of some commonly used in the expansion of some common classes recently in the use of C # 2.0 found several new features, said improper place please correct. 1. Exception exception base class at 2.0, the exception base class adds the Data property, the prototype is as follows, public virtual IDictionary Data {get;} It can be seen that it implements the IDictionary interface, which is used to store the custom information of the exception, thus thinking of the exceptionmanagement In the block, the NameValueCollection class member is added to the baseapplicationexception to have that feature, and exception is the source of the new data attribute? 2. File increases the decryption encryption function to protect the files using the new encryption and decryption method of filename. In the View tab of the Folder Options menu in the Windows2003 System window, you can see that the encrypted file color will be different by selecting the check box (which should also have relevant options in the XP or 2000 system) for displaying the encrypted or compressed NTFS file in color. The specific method is defined below, public static void Encrypt (string path); Encrypt public static void Decrypt (string path);//Decrypt the encryption, the file becomes green, and if the file is not authorized to other users, then the file cannot be accessed when other users log on. Click on the encrypted file property to get more information about the encryption. 3. The DriveInfo class DriveInfo class provides information about the system drive, which is a new class under. NET 2.0 that can be drivers = driveinfo.getdrives () through driveinfo[];

Indicates the amount of available free spaces on a drive. (quotas taken into account)

Gets the name of the file system, such as NTFS or FAT32.

Gets the drive type.

Gets information on whether or not the drive is ready.

Gets the name of the drive.

Gets the root directory of the drive.

Gets the total amount of free spaces available on a drive.

Gets the total size of storage spaces on the drive.

Gets and sets the volume label of the drive.

The Volumelabel above is read-write and the other properties are readonly. When used, it is generally necessary to determine whether the IsReady property is true, and if it is not, then access to other properties will cause an exception, as well as the need to be aware of permission access when the thread is being prepared. The DriveType enumeration is also added under. NET 2.0.

Member name

Description

CDRom

The drive is a CD ROM device.

Fixed

The drive is a fixed disk. (Fixed drive)

Network

The drive is a network drive. (Network Drive)

Norootdirectory

The drive does not have a root directory. (Drives without root)

Ram

The drive is a RAM disk. (RAM Flash memory)

Removable

The drive is a removable storage device. (Removable Storage device)

Unknown

The type of drive is unknown. (Unknown device type)

Use Directory.getlogicaldrives () in version 1.1 to get the drive. Of course, using WMI can also achieve all of these functions. 4. The System.Windows.Forms.Menu class adds the Tag property in 2.0 so that the MenuItem inherited from it also contains the property, just as the Treenode.tag property can hold various objects. 5. The console class is significantly enhanced consle adds a lot of functionality, including setting the appearance size and color of the console form, setting, moving the inside cursor, setting the buffer, determining whether the keyboard's specific keys are turned on, and so on. An example like Console.readkey () and its overloaded methods will be useful. The above features are written for the. NET Framework 2.0 Beta, and there may be some changes after the formal version comes out.