Assemblies are the unit of class deployment in the common language runtime. Developers writing .NET Framework classes using Visual Studio .NET version 7.0 will produce a new assembly with each Visual Studio project that they compile. Although it is possible to have an assembly span multiple portable executable (PE) files (several module DLLs), Visual Studio .NET will, by default, compile all assembly code into a single DLL (1 Visual Studio .NET project = 1 .NET Framework assembly = 1 physical DLL).

You can use an assembly on a computer by deploying it into an assembly cache. The assembly cache can be either global to a computer or local to a particular application. Only code intended to be shared across multiple applications should be placed in the global system assembly cache. Code specific to a particular application, such as most Web application logic, should be deployed in the application's local assembly cache. One advantage of deploying an assembly within an application's local assembly cache is that only code within that application can access it. (This is a nice feature for scenarios involving ISPs.) It also facilitates side-by-side versioning of the same application because classes are private to each application version instance.

This series explains the basic concepts of Object Oriented programming and explains how Visual Basic.NET syntax required to implement OO concepts.

This lengthy video explains the parts of a class, which is the basic building block used in every VB.NET application. Classes have properties and methods, contructors and destructors, and methods can be overloaded. This video starts you out at the very basics of all these concepts, which are more thoroughly explained in future videos in this series. Also, I build a small application that uses a class and step through the code to demonstrate the order of events when creating an instance of an object for your applications.

• The .NET Framework programming model that enables developers to build Web-based applications, smart client applications, and XML Web services applications which expose their functionality programmatically over a network using standard protocols such as SOAP and HTTP.
• Developer tools, such as Microsoft Visual Studio.NET, which provide a rapid application integrated development environment for programming with the .NET Framework.
• A set of servers, including Microsoft Windows 2000, Microsoft SQL Server and Microsoft BizTalk Server, that integrates, runs, operates, and manages XML Web services and applications.
• Client software, such as Windows XP, Windows CE, and Microsoft Office XP, that helps developers deliver a de