This document introduces C# and provides an overview of key concepts like .NET, the Common Language Runtime (CLR), the Framework Class Library (FCL), data types, namespaces, variables, statements, expressions, operators, and references. It also discusses how to build a "Hello World!" program in C# using compilers, command line tools, and Visual Studio with its solution explorer and discusses primitive data types.

1. Introduction To C#
Hello World!
By:- Rahul Sahay
Email:-rahulsahay19@gmail.com

2. Overview
• What is .NET?
• What is the FCL?
• What is the CLR?
• Building Hello, World!
• Basic Expressions and Operators
• Compilers and Command line tools
• Creating projects with Visual Studio

3. .NET

4. CLR

5. FCL

6. What is C#?

7. csc.exe

8. Visual Studio

9. Solution Explorer

10. Types

11. Primitive Types

12. Namespaces

13. Variables

14. Statements & Expressions

15. Operators

16. References

17. Summary
• C# is one of the many languages for .NET
• Syntax similar to C++ and Java
• Strongly typed
• Statements and expressions
• Operators
• References