Csharp-Fundamentals

Hello World in C#

Every programming journey starts with Hello World. Let’s write our first C# program.

The Code

Create a file named Program.cs:

1
Console.WriteLine("Hello, World!");

Yes, …

Variables and Types in C#

March 15, 2026 csharp variables types data-types

C# is a statically, strongly typed language — every variable has a declared type known at compile time, and the compiler enforces type safety throughout your code. This is one of C#’s core …

Operators in C#

May 16, 2026 csharp operators expressions arithmetic

Operators are the verbs of any programming language — they transform values, compare them, and combine them into expressions. C# inherits the familiar infix operator set from the C family (so +, -, *, …

Control Flow in C#

May 31, 2026 csharp control-flow conditionals loops if-else

Control flow is how a program decides what to do and how many times to do it. Without it, code would run top to bottom exactly once with no decisions and no repetition. C# gives you the full toolbox …

Functions in C#

June 16, 2026 csharp functions methods subroutines

Functions are how you wrap a piece of logic in a name so you can call it again and again instead of repeating yourself. In C# the line between a “function” and a “method” is …

I/O Operations in C#

July 3, 2026 csharp io input output files

Input and output are how a program talks to the outside world — printing results to the terminal, reading what a user types, and saving data to files so it survives after the program exits. You …

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