Introduction to Dot NET

       In this dot net tutorial, you will learn about introduction to dot net, introduction to dot net framework, dot net architecture, 

.NET

• .NET=NEXT GENERATION OF MICROSOFT TECHNOLOGY
• It is made up of tools, programming languages and libraries for developing many different types of applications such as desktop, web, console, mobile, cloud applications, etc, …
• .NET is a latest technology not a programming language
• It gives the environment to develop windows and web based GUI applications
• .NET is purely language independent.

.NET Framework

• It is an original implementation of .NET and one of the tools provided by .NET infrastructure & service tools
• It is not a programming language
• Latest version: 4.8.1 (Aug 2022)
• Other Versions: 1.0, 2.0, 3.0, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, etc, …

Three Components

• Each version of NET framework contains the three main components like CLR, base class libraries and other managed libraries

1. Common Language Runtime (CLR)

• Runtime engine in .NET (Runtime manager)
• Convert the IL code (Machine code) into target output

2. Base Class Library

• It gives the support to develop different types of applications using .NET languages
• Ex. System, System.IO, System.Net, System.Xml, etc,.

3. Windows / Web Applications

• Creating windows / web applications using .NET framework

NET ARCHITECTURE

Operating System

• C#.NET is a platform dependant OS
• Fully depends on windows OS only and Little depends on Linux OS

Common Language Runtime (CLR)

• Runtime Engine in .NET
• Mainly used to translate the IL code into target output

Predefined Namespaces

• It represents the built-in namespaces which are actually equivalent to packages in java.

Examples

S.N	Namespaces	Description
1.	System	It is used for basic operations in .NET
2.	System.IO	This namespace is used for input & output related operations, File and Directory related operations
3.	System.Text	This namespace is used to support string features in .NET
4.	System.Data	It is used for database related operationsStorage and retrievalCRUD operations
5.	System.Net	It is used for network related operations
6.	System.Windows.Forms	Used to create Windows GUI application / Desktop based applications
7.	System.Web	This namespace is used to create Web GUI application

TYPES OF .NET APPLICATION

• .NET supports four or more applications. They are

1. Console Application
2. Windows / Desktop Application
3. Web / Internet Application
4. Database Application

1. Console Application

• Creating an application without any graphical component, that is called console application.

2. Windows / Desktop Application (offline)

• Creating an application, with use of graphical components that is called windows GUI Application (windows forms application)
• It is an offline application: possible to run the windows GUI application in a particular machine at a time
• Technologies: WindowsForms (WF.NET), Windows Presentation Foundation (WPF.NET)
• Output: Windows GUI Application (Form window)

3. Web / Internet Application

• Creating an application, with use of graphical components that is called Web GUI Application
• It is an online application: possible to run the web GUI application in a all machine at a time via internet access
• Technologies:  ASP.NET, Windows Presentation Foundation (WPF Browser Application)
• Output: HTML with GUI (Web browser window)

4. Database Application

• Creating a database related application
• Technology: ADO.NET
• Output: DOS Window / Windows GUI / Web GUI
• Language Independent
• .NET is a language independent
• We can develop a software application using any .NET languages.

EXAMPLES

1. .NET Supported Programming Languages

• C#.NET 
• J# 
• VC++ 
• VB.NET 
• Boo 
• Ruby (Iron Ruby) 
• Python (Iron Python), etc…

2 .NET Supported Markup Languages

• HTML 
• XML 
• XAML 
• ASP 
• ASP.NET(C#), etc…