The class is an object-oriented programming term to refer to a data structure that describes an object or a data member. The .Net Framework has an exclusive set of class libraries such as data access, XML support, directory services, regular expression, and queuing support.

The data access class library provides data access ASP.NET Classes to connect to SQL Server or any OLEDB provider. The XML support class library has XML Classes go beyond capability of MSXML. The directory services library is used to access Active Directory/LDAP using ADSI. The regular expression library supports all above mentions ASP.NET Classes any more than that it also supports Perl 5.

All above mentioned class libraries use CLR base class libraries for common functionality. These base class libraries can be divided into six categories:

• Collections: Used to preserve a collection of values or objects in memory. The three commonly used collections ASP.NET Classes are ArrayList, HashTables, and SortedList. The System.Collections namespace is used to derive collections ASP.NET Classes.

By Warren Lynch http://www.wlynch.com

The most important part of buying a digital camera is making sure that one you select meets all of your needs.

Digital Camera 101

Better digital cameras uses a chip called a "Charged Coupled Device" (CCD) instead of film. Light enters camera, through open shutter, and strikes CCD where it is converted to digital data before being stored in camera's memory.

While that is simple description, things can get pretty complicated from there.

Megapixels & Resolution

Resolution is a measure of how many pixels are used to make a digital copy of an image. Pixels are tiny dots of light that make up a digital image.

The quality of a digital camera's image is usually measured in 'Megapixels' where each megapixel represents one million pixels.

Here's how to determine how many megapixels you'll need depending upon type of photos you will be taking and what you intend to do with them.

1 megapixel

Almost obsolete, you might still find these in cell phones, PDAs, and desktop "web" cameras. They're OK if you only intend to email pictures to other people and those people aren't going to be printing them.

1.1 to 2 megapixels

Only slightly better than 1.0, this resolution is OK for an average 4x6 snapshot, but it isn't going to be a production quality image.

2.1 to 3 megapixels