Application Architecture Guide 2.0 BETA 1 - Willy .Net

The Base Class Library (BCL) provides a core set of classes that cover a large range of
programming requirements in a number of areas, including user interface, data access,
database connectivity, cryptography, Web application development, numeric algorithms, and
network communications.
Overlaying the Base Class Library (BCL) are core technologies for developing .NET applications.
These technologies include class libraries and runtime services that are grouped by application
features, such as rich client and data access. As the Microsoft .NET platform evolves, new
technologies are added on top of the core technologies, such as Windows Communication
Foundation (WCF) and Windows Workflow Foundation (WF).
Common Language Runtime (CLR)
The .NET Framework includes a virtual environment that manages the program's runtime
requirements. This environment is called the Common Language Runtime (CLR), and provides
the appearance of a virtual machine so that programmers need not consider the capabilities of
the specific CPU or other hardware that will execute the program. Applications that run within
the CLR are referred to as managed applications, and most .NET applications are developed
using managed code (code that will execute within the CLR).
The CLR also provides services such as security, memory management, and exception handling.
ASP.NET
For Web applications, you use the ASP.NET functionality within the .NET Framework, hosted
within Windows Server Internet Information Services (IIS). The .NET platform provides the
following technology options for Web applications:
• ASP.NET Web Forms. ASP.NET Web Forms are the standard UI design technology for .NET
Web applications. An ASP.NET Web Forms application is installed only on the Web server;
no components are required on the client computer.
• ASP.NET Web Forms with AJAX. Use AJAX with ASP.NET Web Forms to send requests to the
server asynchronously and process the responses on the client. This improves
responsiveness and reduces the number of post backs to the server. AJAX is an integral
component of ASP.NET starting with the .NET Framework version 3.5.
• ASP.NET Web Forms with Silverlight Controls. If you have an existing ASP.NET application,
you can use Silverlight controls to improve the user experience without the requirement to
write a new Silverlight application from scratch.
• ASP.NET MVC. ASP.NET MVC allows you to use ASP.NET to easily build applications that
implement the Model View Controller (MVC) design pattern. ASP.NET MVC supports testdriven
development (TDD), and provides clear separation of concerns between UI
processing and UI rendering.
• ASP.NET Dynamic Data. ASP.NET Dynamic Data allows you to create ASP.NET applications
that leverage LINQ to SQL functionality. This functionality allows you to more easily model
your database in your application, and query the database using LINQ queries.
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