.NET

try, catch, and finally Blocks

Handling errors gracefully in C#

C# uses try, catch, and finally blocks to help you handle exceptions (errors) safely. 🛠️ try Block Put code that might fail here. 1 2 3 4 try { int n = int.Parse("oops"); // Will throw an ex...

Posted by Rodrigo Castro on November 30, 2024

Exception Handling

Dealing with errors in your program

Programs sometimes encounter errors (exceptions). C# gives you tools to handle them safely. ⚠️ What is an Exception? An error that stops your program, like dividing by zero or reading a missing f...

Posted by Rodrigo Castro on November 29, 2024

Type Safety with Generics

How generics prevent bugs

Generics keep your code type-safe, because C# checks that you use the right types. 🚫 Without Generics Using object is flexible, but risky: 1 2 3 4 ArrayList items = new ArrayList(); items.Add("h...

Posted by Rodrigo Castro on November 24, 2024

Declaring and Using Generic Methods and Classes

Make your code flexible and reusable

Generics let you write methods and classes that work with any data type. 🛠️ Generic Method Example 1 2 3 4 5 6 T Echo<T>(T input) { return input; } Console.WriteLine(Echo(5)); // 5...

Posted by Rodrigo Castro on November 23, 2024

Generic Collections: List, Dictionary, Queue, Stack

Storing and working with groups of data

C# gives you powerful built-in collections to store groups of data. 📋 List A resizable list of items. 1 2 3 4 List<string> names = new List<string>(); names.Add("Alice"); names.Add("...

Posted by Rodrigo Castro on November 22, 2024

Working with Generics

Reusable and type-safe code

Generics allow you to write flexible, type-safe code. 📦 What are Generics? Let you create classes/methods that work with any data type. Example: List<T> can hold any type (List<int&...

Posted by Rodrigo Castro on November 17, 2024

Access Modifiers: public, private, and protected

Controlling access to your code

Access modifiers decide who can see and use parts of your code. public Anyone can access. 1 2 3 4 public class Car { public string Model; // Anyone can read/write Model } private Only the...

Posted by Rodrigo Castro on November 16, 2024

Encapsulation, Inheritance, and Polymorphism

The core of OOP in C#

C# is built on object-oriented programming (OOP), which is powered by three main ideas. 🔒 Encapsulation Keep data safe inside a class. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 class BankAccount { pr...

Posted by Rodrigo Castro on November 15, 2024

Classes, Objects, and Methods

Building blocks of C# programs

Classes, objects, and methods are at the heart of C# programming. 🧱 Making a Class A class is a template for creating objects. 1 2 3 4 5 6 7 8 class Animal { public string Name; public v...

Posted by Rodrigo Castro on November 10, 2024

Object-Oriented Programming in C#

Understanding objects, classes, and OOP basics

C# is an object-oriented language. That means you build programs using classes and objects. 🏗️ What is a Class? A class is a blueprint for objects. 1 2 3 4 5 6 7 8 class Car { public string ...

Posted by Rodrigo Castro on November 9, 2024