Working with Net Framework 3.5
Net Framework is a software framework developed by Microsoft, whose main objectives are to support and build the future generation of XML web applications and services. The framework is compatible only with machines running a Microsoft Windows operating system and comes with a class library, as well as a CLR (common language runtime).
The library is important because it offers more than 4,500 classes with rich functionality including: data access, XML, image generation, file upload, SMTP, and much more. For the user interface, there are ASP.NET Web Forms, which support a variety of server controls, business objects, and the ASP.NET Mobile Internet Toolkit, which targets mobile phones, PDAs, and 80 other mobile devices, etc. .
On the other hand, the CLR is considered “the foundation of the .Net framework”, capable of providing services such as: memory and thread management, remoting, and security. In concept, the CLR is similar to a virtual machine that handles the execution of programs.
Being a true object-oriented (OOP) framework, .NET offers improved code management and a clean code structure. It also produces faster web applications using optimized compiled code, compared to other languages, which run as interpreted code. Also, many project managers find the division between code and markup (between logic and design) very effective and allows for more organized and efficient work within a team.
Another great advantage that the .NET framework offers is that it supports more than 25 mainstream coding languages, such as: Visual Basic.Net, C++, C#, JScript, and others. In this way, the developer can choose to work in one language and, at the same time, have access to the main functions of another supported language.
Being built on the Microsoft platform, .Net offers access to up-to-date documentation, trusted Microsoft customer support through the MSDN service, innovative features, and secure applications thanks to integrated Windows authentication. Conceived as a powerhouse for dynamic websites, web services, and web applications, the .NET framework provides developers with rich, easy-to-use, and reliable web tools.
The latest version of the .NET framework, 4.0, was released in March 2010 and comes with powerful new features, such as the 2010 version of Visual Studio and new functionality related to the Microsoft Ajax library. At the same time, it improves existing services, including output caching and session state storage.
With the release of the .NET framework 3.5 (released on November 19, 2007), .Net brought a new advantage: LINQ (Language Integrated Query) functionality, which allows you to work with queries on collections and on almost any type of data. . For programmers, this means code that is expressive and easy to write. The most important updates or novelties that version 3.5 brings are presented below:
Characteristics
.Net Compact Framework An updated feature that allows developers to develop content for Pocket PCs (PDAs) or smartphones. Version 3.5 extends support for mobile apps to include: LINQ (Language Integrated Query), WCF (Windows Communication Foundation), debugging improvements, improved class library documentation, improved SoundPlayer by adding various sounds, improved logging features , etc.
CLR
Version 2.0 of the common language runtime, which ships with .NET 3.5, has the following updated features: performance improvements, garbage collection, time zone improvements, JIT compiler optimizations, and so on.
networks
3.5 introduces “peer-to-peer networking”, which is a technology that allows more machines to share the same resources and communicate directly with each other. In addition, the Socket class has been enhanced to allow its use by applications that use asynchronous networking, for better performance.
wpf
Windows Presentation Foundation includes improvements in the following areas: data binding, annotations, 3D user interface elements, version control, and more. This feature will be detailed in the next section.
WCF and WF
The .NET Framework 3.5 merges Windows Workflow Foundation (WF) and Windows Communication Foundation (WCF), to allow the user to create services that can easily transfer data in and out of a workflow, and can apply application-layer protocols.
windows forms
Windows Forms has been updated to host WPF controls and content alongside Windows Forms controls. Other new features that the .NET Framework 3.5 brings are “client application” services that allow Windows-based applications (including Windows Forms and Windows Presentation Foundation applications) to easily access login services, roles, and profiles. from ASP.NET. (These services allow developers to authenticate users and also retrieve user roles and application settings from a shared server.
LINQ
Language Integrated Query is a new feature that comes with Visual Studio 2008 that adds “native data query capability” to C# and VB.NET.
The .NET Framework 3.5 introduces LINQ provider assemblies that enable the use of LINQ to query .NET Framework collections, SQL Server databases, ADO.NET data sets, and XML documents.
expression trees
This is a new feature that allows language level code to be represented as data. Expression trees are most commonly used in LINQ queries that target remote data sources, such as an SQL database. Queries are represented as expression trees, and these representations, in turn, allow query providers to verify and translate them into a domain-specific query language.
The .Net 3.5 framework allows developers to focus on the application instead of searching for the right tools, which saves time, keeps code clean and easy to understand, and also reduces costs.