C# Nullable Types, What Is Nullable Types In C#, The syntax of Nullable Type In C#, Declaring Nullable Types In C#, Nullable Types In C# Example

C# Nullable Types | What Is Nullable Types In C# with Example

In this article, we are going to learn about C# Nullable Types / Nullable Type In C#. Before defining Nullable types, Let’s understand why c# nullable types introduced? what is nullable type in c# and then how to use them?

Why C# Nullable Types?

To understand the answer, why c# nullable types? and follow the problem that nullable type can solve. The c# programming language support two kinds of data types.

  • Value type (e.g., struct, int, double, etc.)
  • Reference type (e.g., string, object, etc.)

Assigning a null value to a value is not possible until nullable types were introduced in .NET framework. By taking the advantage of nullable types now value type can store a null value.

A nullable type can hold a correct range of values of a value type (int, boolean etc.) plus NULL. This feature is really helpful when you are working with the database in real-time applications. In a real-time application, there are possibilities that database fields like boolean may need to hold true, false or undefined. Using this nullable type we can solve the problem of undefined.

The syntax of Nullable Type In C#

Declaring Nullable Types In C#

Nullable Types In C# Example

The following example will demonstrate the nullable types usage. number1 assigned to a null value and number2 with 22. Once the code is executed it will give you blank value because of nullable and second with 22 because the value is assigned.

The output of the program when compiled and executed

 

C# 8.0 Features, New Features In C# 8.0

C# 8.0 Features | New Features In C# 8.0

C# programming language is the most popular because every release makes the job easier. From past two decades, it has released seven versions now came up with c# 8.0. Let’s see C# 8.0 features.

New Features In C# 8.0 | C# 8.0 Features

  1. Default Implementation for Interfaces.
  2. Light Weight Classes.
  3. Nullable Types.

Default Implementation for Interfaces in C# 8.0

Default implementation for an interface is an exciting feature in C# 8.0. Until 7.0, we could only see interfaces only with abstract methods but now in .NET framework 8.0 added a default implementation for interface methods.

Using default implementation for interface has made drastic changes in development life cycle.

The default implementation of interfaces will provide a most powerful way to extend the classes that implement interfaces.

C# Light Weight Classes, records in C#

C# Light Weight Classes – Records in C#

C# Light weight classes allow creating a class more flexible. It’s beautiful and new way to build your class called as records. Records in c# enable creating POCO type objects very quickly. Records / C# Light Weight Classes also solve the problem of equality comparison of objects.

Creating a C# Light Weight Classes

The below example will help you to understand in implement immutable classes and auto implementation of properties. Person class has a private set property which can be initialized only by a constructor. This example you can see, how to initialize the dynamic object creation using LINQ.

Example