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

C# .NET OOP 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


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This tutorial is the last of the object-oriented programming in C# .NET course. We'll discuss nullable types, cloning, attributes, destructors and more.
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Article has been written for you by David Capka
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.
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