C# Nullable reference types – No more null reference exceptions!

Are you tired of null reference exceptions and unexpected crashes due to uninitialized variables? There’s a very handy feature in C# called nullable references types that will help you catch this before it becomes a problem!

In this video we are exploring nullable reference types in C#. This is a great addition to the C# language!

This language feature was first introduced in C# 8.0 and is a great way to find potential problems, before it becomes an issue!

Enable nullable reference types in your project by modifying the csproj file.

This video also includes details on how to use the C# 9.0 language features 'new expression' and 'init only setters'.

Table of contents:
00:00 Introduction
00:33 Why do null reference exceptions occur?
01:14 C# 9.0: 'new expression'
04:29 Nullable Reference Types
05:06 Nullable Reference Type Syntax
05:21 Enable the Nullable Reference Types on the Project level
05:56 Compiler Warnings
06:33 Introducing a Nullable Reference Type
09:07 More Compiler Warnings
09:55 Damn it/Null forgiving operator
12:39 C# 9.0: Init only setters
15:34 Enable the Nullable REference Types using Directives
16:04 Summary

DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the links, I may receive a small commission.

[Mosern]

This is super useful to get into the compiler. I bet probably 80% of the exceptions I encounter are Null Reference Exceptions. Also I shoutout to a quick Yield video.

[uncommonbg]

Wow, your way of presenting information is just phenomenal.

[jaswantbisane]

Like your content! Please add a video on Events and Delegates.

[Al-mansur]

very informative, what a great Teacher <3

[saeedsubhani]

Thanks soooo much I needed to hear the first part where you have to use new to allocate an instance. Thanks for the info, your a life saver.

[GBG]

thank you for a great presentation, it simplified and understanding the work with issue nullable and very handy with key features in C#9

[Time]

You make me recheck all my projects and rethink about nullable types. Thanks for the info shared.

[spyros]

Very good and clear explanation. Thank you.

[niloo]

Thanks for the great content. That would be more great if you get to "yield" later in another video. Cheers!

[rady]

I’m starting out with c# kinda and am going through a c# book and doing the activities when I seen an null warning and wanted to see what it meant and ways to fix it. Great vid

[qwerty]

Hi, thank you for this great video. It's easy to understand 👍

I also agree that your next vid should be the yield keyword :)

[chandanpandey]

Thanks for delivering deep diving leacture 👍

[MrLucki]

You are providing very good explanations!!! Please publish more videos in the future.

[sonomirco]

Great video super useful. It would be great to have a video on yield!!!

[bns]

Watched your async course on Pluralsight, best C# tutorial author and tutor!

[shubhamshukla]

Very good video. Hope you make many more.

[zerg]

Omg! Perfect. Not indian english. Thank you for the content!

[zankomag]

OMG, You make such a good content, I like you!

[chammu]

Thank you for the clear explanation .What is the use of #nullable restore and when to use it?

[fishzebra]

Very clear thanks.

Using Nullable Ref Types with EF POCO classes feels awkward, I've been suppressing it with the null forgivable operator, but maybe 'init' from C#9 will improve this?

And yes for Yield