This document provides an introduction to the .NET framework, describing its major components and how they work together. The .NET framework consists of: - The Common Language Specification (CLS) which allows applications to be written in multiple languages. - The Framework Class Library (FCL) which provides over 7,000 classes for common tasks like file access. - The Common Language Runtime (CLR) which acts as an execution engine, managing memory, security, and interfacing with the operating system. - .NET tools like Visual Studio which provide an integrated development environment for building .NET applications.

1. Introduction to .NET
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Gaurav Singh ,CSE dept., SRIIT BANMORE

2. .NET Framework
• Microsoft .NET (pronounced “dot net”) is a software component
that runs on the Windows operating system.
• .NET provides tools and libraries that enable developers to
create Windows software much faster and easier.
• The .NET Framework must be installed on a user’s PC to run
.NET applications.
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3. .NET Architecture
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4. Components of .NET Architecture
•Microsoft .NET consists of four Major Components:
• Common Language Specification (CLS) – blue in the diagram
below
• Framework Class Library (FCL) – red
• Common Language Runtime (CLR) – green
• .NET Tools – yellow
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5. Operating System : windows
At the base of the diagram in gray is the operating system,
which technically can be any platform but typically is
Microsoft Windows 2000 or greater, accessed through
the Win32 API (Application Programming Interface).
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6. Common Language Specification (CLS)
• The CLS is a common platform that integrates code and
components from multiple .NET programming languages.
• In other words, a .NET application can be written in multiple
programming languages with no extra work by the developer
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7. .NET Languages
• .NET includes new object-oriented programming languages
such as C#, Visual Basic .NET, J# (a Java clone) and Managed
C++.
• These languages, plus other experimental languages like F#,
all compile to the Common Language Specification and can
work together in the same application.
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8. Common Language Specification (CLS)
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9. Framework Class Library (FCL)
• The FCL is a collection of over 7000 classes and data types that
enable .NET applications to read and write files, access
databases, process XML, display a graphical user interface, draw
graphics, use Web services, etc.
• The FCL wraps much of the massive, complex Win32 API into
more simple .NET objects that can be used by C# and other
.NET programming languages.
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10. Framework Class Library
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11. Common Language Runtime (CLR)
• The CLR is the execution engine for .NET applications and serves
as the interface between .NET applications and the operating system.
• The CLR provides many services such as:
• Loads and executes code
• Converts intermediate language to native machine code
• Separates processes and memory
• Manages memory and objects
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12. • Enforces code and access security
• Handles exceptions
• Interfaces between managed code, COM objects, and
DLLs
• Provides type-checking
• Provides code meta data (Reflection)
• Provides profiling, debugging, etc.
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13. Common Language Runtime (CLR)
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Fig: CLR Execution Model

15. .NET Tools
• Visual Studio .NET is Microsoft’s flagship tool for developing
Windows software.
• Visual Studio provides an integrated development environment
(IDE) for developers to create standalone Windows applications,
interactive Web sites, Web applications, and Web services
running on any platform that supports .NET.
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16. .NET Tools
• In addition, there are many .NET Framework tools designed to
help developers create, configure, deploy, manage and
secure .NET applications and components.
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17. …… Thank You ……
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Gaurav Singh ,CSE dept., SRIIT
BANMORE