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With LINQ you can create queries within your Visual C# code and query and update all kinds of data (arrays, lists, XML, Web services, SQL databases) easily Here s a formal definition of LINQ, and then let s jump into the code: Language-Integrated Query (LINQ) adds query capabilities to Visual C# and provides simple and powerful capabilities when you work with all kinds of data Rather than sending a query to a database to be processed, or working with different query syntax for each type of data that you are searching, LINQ introduces queries as part of the Visual C# language It uses a unified syntax regardless of the type of data LINQ enables you to query data from a SQL Server database, XML, in-memory arrays and collections, ADONET datasets, or any other remote or local data source that supports LINQ.

You forgot your supervisor password and need to remove it by editing the registry. To remove the supervisor password for Content Advisor from the registry should the password be forgotten, follow these steps:

The registry file that contains the data used to create the registry key HKEY_LOCAL_ MACHINE\SYSTEM. This key contains information that the operating system requires to start devices and system services. Driver files for hardware devices, such as keyboard, mouse, and video.

Windows NT 4.0, Windows 2000, Windows Server 2003, and Windows XP Professional define the system and boot partitions differently from other operating systems. The system volume contains files that are needed to start Windows XP Professional, such as the Windows loader (Ntldr). The boot volume contains Windows XP Professional operating system files and folders such as systemroot and systemroot\System32. The boot volume can be, but does not have to be, the same volume as the system volume.

Part V:

1 Choose Start, Run. 2 Type regedit in the Open box and click OK or press Enter to open Registry Editor. 3 In Registry Editor, you ll see a listing of root keys, which are different divisions of

In Table 29-1, the term systemroot is one of many environment variables used to associate string values, such as folder or file paths, to variables that Windows XP Professional applications and services use. For example, by using environment variables, scripts can run without modification on computers that have different configurations. To obtain a list of environment variables useful for troubleshooting, type set at the command line. For more information about environment variables, see To add or change the values of environment variables in Windows XP Professional Help and Support Center. For more information about system files, see Appendix A, System Files Reference.

As soon as you turn on a computer, its central processing unit (CPU) begins to carry out the programming instructions contained in the basic input/output system (BIOS). The BIOS, which is a type of firmware, contains the processor-dependent code that starts the computer regardless of the operating system installed. The first set of startup instructions is the power-on self test (POST). The POST is responsible for the following system and diagnostic functions:

Performs initial hardware checks, such as determining the amount of memory present Verifies that the devices needed to start an operating system, such as a hard disk, are present Retrieves system configuration settings from nonvolatile complementary metal-oxide semiconductor (CMOS) memory, which is located on the motherboard The contents of CMOS memory remain even after you shut down the computer. Examples of hardware settings stored in CMOS memory include boot order and Plug and Play information.

the registry that hold different kinds of information. The Content Advisor password is stored in the HKLM root key, which represents HKey_Local_Machine.

After the motherboard POST completes, add-on adapters that have their own firmware (for example, video and hard drive controllers) carry out internal diagnostic tests. To access and change system and peripheral firmware settings, consult the system documentation provided by the manufacturer.

After the POST, the settings that are stored in CMOS memory, such as boot order, determine the devices that the computer can use to start an operating system. For example, if the boot order specifies the floppy disk as the first startup device and the hard disk as second (some firmware displays this order as A, C ), the following scenarios might occur at startup: The floppy disk drive contains a floppy disk The BIOS searches the floppy disk drive for a bootable floppy disk. If one is present, the first sector (the floppy disk boot sector) loads into memory. If the floppy disk is not bootable, an error message similar to the following appears:

expanding by clicking Software, followed by Microsoft, Windows, CurrentVersion, Policies, and Ratings.

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