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Feedback, contact and registration forms as well as content management systems that support insert, update and delete functions are all common scenarios where form validation should be implemented.

Explains how to manage a session and application state objects in ASP.NET Web Services. Using session objects is always a good option for maintaining per user data. But the case of web services is different. In real life, Web services may be called thousands of times a day. In such cases, keeping per user data in the webserver would be a bad approach.

Explans in details how to use XML automatic documentation tags in ASP.NET 2.0 source code. We will illustrate in more details how you can benefit from this technique to the most extent by using some other recommended XML tags to give more comprehensiveness and functionality to your final documentation file.

Caching is the most effective technique you can use to improve the performance of your ASP.NET web application. Designing your application with caching in mind, improves both the performance and the scalability of that application.

Explains how to debug ASP.NET application by using breakpoint's advantages. Application code is subject to many types of errors. Examples are syntax errors, and bugs. Most syntax errors can be easily fixed during the compilation phase. On the other hand, most bugs require debugging!

As we all know, I/O operations is one of the most time consuming operations. In the same time, IO is one of the most needed operations almost in all applications. To make our applications faster and having more responsive user interface, we need to perform those I/O operations asynchronously. This tutorial explains how to make faster and more responsive user interface through asynchronous I/O operations in ASP.NET 2.0 Web application.

Asynchronous operations or execution pattern is another face of multithreading. Some operations are time consuming, take long time to complete, and block user interface waiting for their completion. This tutorial explains how to to create asynchronous pages for long time consuming operations.

Visual Studio Express Editions are a new line of Microsoft development Tools. This line of products is an expansion of the Microsoft Visual Studio and SQL Server products. It is a lightweight, yet powerful, easy to use and learn tools for beginners, students, and hobbyist users.

I am sure that most of us before going for shopping on a certain occasion, we have to dig up our mind to draft a shopping list. This tutorial will explain how to build a shopping list using ASP.NET 2.0 with MS SQL database. Based on this article, some cool technical stuff in Visual Web Developer will be used to facilitate our work.

Using design patterns can lead to better designed and implemented object oriented programs. They can also help make code more understandable. The Programmer's Heaven design patterns school covers each design pattern, complete with explanations and code examples in VB.NET. It also looks at the approach taken by the creators of design patters and the motivation for using them in your own development.

.NET Framework supports all major programming languages. Some of them are as below� * ASP * ASP.NET * APL * C++ * C# * COBOL * Component Pascal and more

What is the Microsoft .NET Framework 3.0? The Microsoft .NET Framework 3.0 (formerly known WinFX), is the new managed code programming model for Windows. .NET Framework 3.0 is combines the power of the .NET Framework 2.0 with four new technologies

The Microsoft Windows Presentation Foundation provides the foundation for building applications and high fidelity experiences in Windows Vista, blending together application UI, documents, and media content, while exploiting the full power of your computer.

What is Windows Communication Foundation (WCF)? Windows Communication Foundation (formerly code-named "Indigo") is a set of .NET technologies for building and running connected systems. It is a new breed of communications infrastructure built around the Web services architecture. Advanced Web services support in Windows Communication Foundation provides secure, reliable, and transacted messaging along with interoperability.

What is Windows CardSpace (WCS, formerly �InfoCard�)? Windows CardSpace is a Microsoft .NET Framework version 3.0 (formerly WinFX) component that provides the consistent user experience required by the identity metasystem. It is specifically hardened against tampering and spoofing to protect the end user's digital identities and maintain end-user control.

Metadata stores the following information: Description of the assembly. Description of types. Attributes.

The CLS provides following advantages: Access to Complete .NET Framework hierarchy. High level of interoperability within languages.(e.g. - C# Class can be inherit from a Visual Basic class). Component is accessible from any programming language that supports the CLS. All CLS-compliant languages can produce verifiable code so the type safety of code possible.

Assemblies contain tables of metadata. These tables are described by the CIL specification. The metadata tables will have zero or more entries and the position of an entry determines its index. When CIL code uses metadata it does so through a metadata token. This is a 32-bit value where the top 8 bits identify the appropriate metadata table, and the remaining 24 bits give the index of the metadata in the table. The Framework SDK contains a sample called metainfo that will list the metadata tables in an assembly; however, this information is rarely of use to a developer.

Metadata provides the following major benefits: Self-describing files � Common language runtime modules and assemblies are self-describing. A module's metadata contains everything needed to interact with another module. Metadata automatically provides the functionality of IDL in COM, allowing you to use one file for both definition and implementation. Runtime modules and assemblies do not even require registration with the operating system. As a result, the descriptions used by the runtime always reflect the actual code in your compiled file, which increases application reliability.

n assembly performs the following functions: It contains code that the common language runtime executes. Microsoft intermediate language (MSIL) code in a portable executable (PE) file will not be executed if it does not have an associated assembly manifest. Note that each assembly can have only one entry point (that is, DllMain, WinMain, or Main).