Lesson 21 - Nullable types, cloning, attributes, destructor and more

In the previous lesson, Structures, boxing, partial members and methods in detail, we introduced some last OOP syntax of C# .NET. In today's tutorial, we're going to finish it.

Nullable types

We often encounter problems when using value types, especially when it comes to databases. In databases, each column can contain a null value. Unfortunately, the .NET value data types cannot contain that value. We can, however, easily specify a data type as nullable by suffixing it with a question mark. Then, C# allows us to store a null value into variables of that type. You will find that this is a very common practice when working with databases. The value inside a nullable type can be accessed via


 

...End of the preview...
Continue further

You will gain knowledge worth hundreds of thousands for a few crowns

You've come here and that's great! We believe that the first lessons showed you something new and useful
Do you want to continue the course? Go to the premium section.

Limited offer: Learn all knowledge and save money

Buy lessons and exercise submitting one by one 269 points
Buy all currently available lessons with exercise submitting and other features for an exclusive price 207 points ($18.63)
Currently, you have 0 points
By buying this exclusive package, you'll have access to all 36 lessons in this course including exercise submitting while saving $3.24. This offer is limited for the first lessons only with an additional exclusive 15% discount.
You gain 207 points for adding an article to the site, or for $21.87 $18.63

Warning, by buying just this lesson you'll lose the limited 15% discount for the package of all the lessons.

Buy only the lesson 10 points
Currently, you have 0 points
You gain 10 points for adding an article to the site, or for $0.90

This article is licensed: Premium, by buying this article, you agree with the terms of use.

What will you get from us in the next lessons?
  • Unlimited and permanent access to individual lessons.
  • High quality IT knowledge.
  • Skills to help you get your dream and well-paid job.

Article description

Requested article covers this content:

This tutorial is the last of the object-oriented programming in C# .NET course. We'll discuss nullable types, cloning, attributes, destructors and more.

You gain points by supporting our network. This is done by sending a helpful amount of money to support the site, or by creating content for the network.

Article has been written for you by David Capka
Avatar
The author is a programmer, who likes web technologies and being the lead/chief article writer at ICT.social. He shares his knowledge with the community and is always looking to improve. He believes that anyone can do what they set their mind to.
Unicorn university David learned IT at the Unicorn University - a prestigious college providing education on IT and economics.
Activities