Object-oriented programming in C# .NET
C# .NET OOP
Lesson 1 - Introduction to object-oriented programming in C# .NET
In this tutorial, we'll introduce object-oriented programming, explain it's historical origins as well as terms such as classes, attributes, and methods.
Lesson 2 - First object-oriented application in C# - Hello object world
In this tutorial we'll create our first object-oriented app in C# .NET - Hello object world. We'll create classes, attributes and parametrized methods.
Exercises for OOP in C# .NET lesson 1-2
Solved programmer tasks in C# .NET on the basics of object-oriented programming. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 3 - RollingDie in C# .NET - Constructors and random numbers
In this tutorial, we'll learn how to use constructors and random number generators. We'll program a rolling die in C# .NET, as the first part of our arena.
Exercises for OOP in C# .NET lesson 3
Solved programmer tasks in C# .NET on constructors, encapsulation, and "Random". Tasks are ordered by difficulty. Solutions are available for download.
Lesson 4 - Reference and value data types in C# .NET
In this tutorial, we'll explain in detail how C# .NET works with references (objects) and value data types in memory.
Exercises for OOP in C# .NET lesson 4
Solved programmer tasks in C# .NET on object references and the null value. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 5 - Warrior for the arena in C# .NET
In this C# .NET tutorial, we'll create a warrior object (class). Its instances will battle in the arena next time.
Lesson 6 - Arena with warriors in C# .NET
In this tutorial, we'll finish our arena with warriors. As a result, we'll have an object-oriented application simulating a board game.
Lesson 7 - Inheritance and polymorphism in C# .NET
In this tutorial, we'll go over object inheritance and polymorphism. We'll learn how to reuse code and explain what the protected access modifier is.
Lesson 8 - Arena with a mage in C# .NET (inheritance and polymorphism)
In this C# .NET lesson, you'll learn how to call base constructors, override methods and put what you know about inheritance and polymorphism to the test.
Exercises for OOP in C# .NET lessons 5-8
Solved programmer tasks in C# .NET on inheritance and polymorphism. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 9 - Static class members in C# .NET
In this C# lesson, we'll learn how to use static fields, methods, and constructors. We'll even get to create our own static class - a static registry.
Exercises for OOP in C# .NET lesson 9
Solved programmer tasks in C# .NET on static attributes and methods. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 10 - Properties in C# .NET
In this C# .NET tutorial, we'll introduce properties (auto-implemented getters and setters) that will provide better object encapsulation.
Lesson 11 - Date and time in C# .NET
In this tutorial, we'll learn how to work with date and time in C# .NET. We'll discover new DateTime and TimeSpan classes. We'll create some sample apps.
Exercises for OOP in C# .NET lesson 11
Solved programmer tasks in C# .NET on the topic of date and time. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 12 - Lists in C# .NET
This tutorial introduces the List collection in C# .NET into which we can easily add and remove items. We'll create a sample app and cover some methods.
Lesson 13 - Diary with a database in C# .NET
In this tutorial, we'll create an electronic diary with a database using the List collection. It'll be able to add, remove and search entries.
Exercises for OOP in C# .NET lessons 12-13
Solved programmer tasks in C# .NET on the topic of List collections. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 14 - Interfaces in C# .NET
In this tutorial you'll learn about interfaces, how to auto-implement them with Visual Studio, and how to replace multiple inheritances with them.
Lesson 15 - Type casting and object hierarchy in C# .NET
You'll learn how to cast an instance to another data type using interfaces. You will also learn about and create an object hierarchy.
Lesson 16 - Abstract class, comparing and operator overloading
This tutorial explains abstract classes in C# .NET. You'll learn about interfaces, implement your own comparing with IComparable, and overload operators.
Exercises for OOP in C# .NET lessons 14-16
Solved programmer tasks in C# on interfaces, abstract classes, and operators. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 17 - Indexers, Equals, constants, enumerated types and flags
This tutorial is about indexer overloading, the Equals method as well as the == operator, constants, enumerated types (enums) and flags.
Lesson 18 - Delegates, anonymous methods and lambda expressions in C#
In this lesson, you will learn about delegates in C# .NET, learn how to define anonymous methods and work with lambda expressions.
Exercises for OOP in C# .NET lessons 17-18
Solved programmer tasks in C# .NET on the topics of enums, indexers and delegates. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 19 - Events in C# .NET
In this tutorial, we'll introduce events and the EventHandler delegate. As an example, we will have a listener react to instance changes.
Exercises for OOP in C# .NET lesson 19
Solved programmer tasks in C# .NET on the topic of declaring and inheriting events. Tasks are ordered by difficulty. Solutions are available for download.
Lesson 20 - Structures, boxing, partial members and methods in detail
In this tutorial, we'll discuss structures, boxing, partial members, and methods in detail in C# .NET.
Lesson 21 - Nullable types, cloning, attributes, destructor and more
This tutorial is the last of the object-oriented programming in C# .NET course. We'll discuss nullable types, cloning, attributes, destructors and more.
Online object-oriented programming in C#.NET quiz
Test yourself online! Results of the C# .NET OOP knowledge quiz, table of the best network members.