The document introduces C# and the .NET framework. It states that the .NET framework is a development environment created by Microsoft to build applications, and contains pre-written codes that can be used from languages like C#. C# is an object-oriented programming language developed by Microsoft for the .NET framework to create various application types such as Windows, web, and mobile apps. The C# code is compiled into an intermediate language code and then executed by the .NET runtime environment.

1. INTRODUCTION TO C#
M3 COMPUTER SCIENCE CLASS – TERM 2
THE PRINCE ROYAL'S COLLEGE

2. WHAT IS .NET FRAMEWORK?
• .NET Framework – (dot net
framework) is a computing
environment developed by
Microsoft to develop
applications. It is not
necessarily exclusive to
Windows OS (i.e. Windows
Phone, Windows 8, RT, etc.). It
is designed to be used by a
different number of

3. WHAT IS IN THE .NET FRAMEWORK?
• In the .NET Framework
are a set of codes (pre-written
instructions or
commands) that you use
from your client
language (i.e. C#).

4. WHAT IS C#?
• C#- is a programming
language developed in
2001by Microsoft for the
.NET Framework. It is a
simple, modern, general-purpose,
object-oriented
(class-based) programming
language.
C#?

5. WHAT CAN YOU BUILD OUT OF C#?
• Windows
Applications
• Console
Applications
• Web Applications
• XML Web Service
• Database
Applications
• Windows Service
• Windows
Controls
• Web Controls
• Mobile Apps

6. WHAT IS COMPILATION?
• Compilation- is translating
written program from a
programming language to
machine language

7. HOW IS C# COMPILED IN .NET?
Code in C#
C#
Compiler
IL (Intermediate
Language) Code
CLR Just-In-
Time Execution

8. THE END