[C#] Null Reference & Reference Types in C# | Plus Nullable Data Types & The NullReferenceException

[C#] Null Reference & Reference Types in C# | Plus Nullable Data Types  & The NullReferenceException

Today you'll learn all about the Null literal and Null reference in C# We'll take a look at what a reference type is and find out what references are exactly. This is the standard Microsoft docs definition Ace. We also have a brief look at the differences between reference types and value types Then I'll explain what the 'null' literal is and discuss the 'null' reference. This features a look at the Null Reference Exception (NullReferenceException), an error you will see throughout your programming life Ace After that we'll see what a 'null-coalescing operator' (??) is. This is similar to the ternary operators we have seen before Ace, and I'll give you a quick explanation of them And finally we'll touch upon Nullable types. Here I'll give you the Microsoft docs explanation and show you examples with the 'int?' type. The Nullable type uses generics Ace, but we won't be covering those in this video. I'll also show you the 'HasValue' and 'Value' property of the type, and I'll also show you the “InvalidOperationException: Nullable object must have a value”. As always Ace, I want to thank you so much for your continued support, with your comments, ratings and subscriptions. It really means a lot to me and keeps me motivated to create these videos for you. Enjoy :) [ Info ] Email ~ RetroTK2@gmail.com Music ~ [Lensko - Heaven] https://www.youtube.com/watch?v=T3iSD8L0MUo Subscribe ~ http://www.youtube.com/channel/UC1Ff3gOuY3FiijhhjFZmKAw?sub_confirmation=1 Share Video ~ https://youtu.be/Eg0FMAnMiT0 Channel Files Git ~ https://gitlab.com/RetroTK2/Channel-Files.git Channel Files ~ https://gitlab.com/RetroTK2/Channel-Files/repository/archive.zip?ref=Channel

null reference in c#

null reference in c#

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How to Fix Null Reference Exception Error

How to Fix Null Reference Exception Error

This is one of the most common questions I get so I thought it would be good to answer it in video format. Thanks for watching and checking out my videos! I have a Patreon where you can help support me, so I can keep making more like this: https://www.patreon.com/Byeka

What is a NullReferenceException and how do I fix it?

What is a NullReferenceException and how do I fix it?

I have some code and when it executes, it throws a NullReferenceException, saying: Object reference not set to an instance of an object. What does this mean, and what can I do about it?

Reference Variable In C++

Reference Variable In C++

In the C++ programming language, a reference is a simple reference datatype that is less powerful but safer than the pointer. There are few rules of reference: 1) Can't be NULL 2) Once they are set for referring one variable, they can not be changed to refer some other variable. 3) You can not create reference variable without referring some variable. ++++++++++++++++++++++++++++++++++ RECOMMENDED BOOKS TO STUDY C++ ++++++++++++++++++++++++++++++++++ BEGINNERS BOOKS FOR C++ (No previous programming experience required): ====================================================================== (1) Book : Object-Oriented Programming with C++ 6th OR 7th Edition Author: E Balagurusamy (Famous Indian Auther) Buy : 6th Edition : http://amzn.to/2fTvaHF : 7th Edition : http://amzn.to/2fU2T3M NOTE: if you are Indian and looking for first book, then this is the one (most college prefer this book). (2) Book : The Complete Reference, 4th Edition Author: Herbert Schildt Buy : http://amzn.to/2kyq3lg BEGINNERS BOOKS FOR C++ (REQUIRES a little previous programming knowledge): =========================================================================== (3) Book : C++ Primer Author: Stanley Lippman, Josée Lajoie, and Barbara E. Moo Buy : http://amzn.to/2wFuSea Full Description: http://accu.org/index.php?module=bookreviews&func=search&rid=1848 (4) Book : Accelerated C++ Author: Andrew Koenig and Barbara Moo Buy : http://amzn.to/2g2TKtw Full Description: http://accu.org/index.php?module=bookreviews&func=search&rid=1185 ADVANCE BOOKS ON C++: ====================== (5) Book : Modern C++ Design Author: Andrei Alexandrescu Buy : http://amzn.to/2g0MgHl Full Description: http://accu.org/index.php?module=bookreviews&func=search&rid=979 (6) Book : C++ Concurrency In Action Author: Anthony Williams Buy : http://amzn.to/2yyjWDP Full Description: https://accu.org/index.php?module=bookreviews&func=search&rid=1850 (7) Book : C++ Templates: The Complete Guide Author: David Vandevoorde and Nicolai M. Josuttis Buy : http://amzn.to/2g1LUjY Full Description: http://accu.org/index.php?module=bookreviews&func=search&rid=506 MOST RECOMMENDED BOOKS FOR EXPERIENCED C++ DEVELOPERS (more about C++ quirk): ============================================================================= (8) Book : Effective C++ Auther: Scott Meyers Buy : http://amzn.to/2g1VTpj Full Description : http://accu.org/index.php?module=bookreviews&func=search&rid=700 (9) Book : Effective Modern C++ Auther: Scott Meyers Buy : http://amzn.to/2g2ls9Q (10) Book : Effective STL Auther: Scott Meyers Buy : http://amzn.to/2wFdrKX Full Description: http://accu.org/index.php?module=bookreviews&func=search&rid=67 (11) Book : More Effective C++ Auther: Scott Meyers Buy : http://amzn.to/2g0R9QH

[UNITY/C# TUTORIAL] Null Reference Exception: The Basics Of This Super Frustrating Error!

[UNITY/C# TUTORIAL] Null Reference Exception: The Basics Of This Super Frustrating Error!

Hey guys! I'm back! The upload schedule thing clearly isn't working so I'll be uploading whenever I have videos ready to go. Patrons will still have early access though. Today we're going to be taking a look at Null Reference Exceptions. What they are, why they happen, and how to fix this super frustrating error. This is just the basics so if there's anything that I miss or should elaborate on let me know in the comments! The MSDN for NRE's: https://msdn.microsoft.com/en-us/library/sxw2ez55.aspx?cs-save-lang=1&cs-lang=csharp#code-snippet-1 Need Unity? Get it here: https://unity3d.com/get-unity/download Check out the Unity documentation: https://docs.unity3d.com/Manual/index.html Have questions about Unity? Ask here: https://answers.unity.com/index.html Join my Discord: https://discord.gg/QSymWQg Follow me on Twitter to stay up to date: https://twitter.com/nix_interactive Or Facebook: https://www.facebook.com/nixinteractive/ Check out my Patreon: https://www.patreon.com/nixinteractive/memberships Don't wanna do a monthly pledge? Buy me a Coffee instead! ko-fi.com/nixinteractive Or you can donate through StreamLabs: https://streamlabs.com/nixinteractive Need 3D models? Check out my Turbosquid: https://www.turbosquid.com/Search/Artists/Nix-Interactive

C Language tutorial||onlinetraining|| What is null pointer? by Sivaramayya

C Language tutorial||onlinetraining|| What is null pointer? by Sivaramayya

DURGASOFT is INDIA's No.1 Software Training Center offers online training on various technologies like JAVA, .NET , ANDROID,HADOOP,TESTING TOOLS ,ADF,INFORMATICA,TABLEAU,IPHONE,OBIEE,ANJULAR JS, SAP... courses from Hyderabad & Bangalore -India with Real Time Experts. Mail us your requirements to durgasoftonlinetraining@gmail.com so that our Supporting Team will arrange Demo Sessions. Ph:Call +91-8885252627,+91-7207212428,+91-7207212427,+91-8096969696. http://durgasoft.com http://durgasoftonlinetraining.com https://www.facebook.com/durgasoftware http://durgajobs.com https://www.facebook.com/durgajobsinfo......

Pointer types, pointer arithmetic, void pointers

Pointer types, pointer arithmetic, void pointers

See complete series on pointers here http://www.youtube.com/playlist?list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_ In this lesson, we will discuss why pointers are strongly typed, how they are de-referenced in memory, pointer typecasting and void pointers. We will look though these concepts through code examples. For practice problems and more, visit: http://www.mycodeschool.com Like us on Facebook: https://www.facebook.com/MyCodeSchool Follow us on twitter: https://twitter.com/mycodeschool

Character arrays and pointers - part 1

Character arrays and pointers - part 1

See complete series on pointers in C/C++ here: http://www.youtube.com/playlist?list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_ See part 2 of this lesson here: https://www.youtube.com/watch?v=vFZTxvUoZSU&list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_ In this lesson, we have described how we can work with character arrays using pointers. Character arrays are used to store strings in C and we work with them for all kind of string manipulation. Working with string in C is tricky and requires good understanding of pointers. Feel free to drop your comments. feedback and suggestions. For practice problems and more, visit: http://www.mycodeschool.com Like us on Facebook: https://www.facebook.com/MyCodeSchool Follow us on twitter: https://twitter.com/mycodeschool

Dynamic memory allocation in C - malloc calloc realloc free

Dynamic memory allocation in C - malloc calloc realloc free

See complete series on pointers here: http://www.youtube.com/playlist?list=PL2_aWCzGMAwLZp6LMUKI3cc7pgGsasm2_ In this lesson, we will be discussing the use of library functions in C for dynamic memory allocation and deallocation. These functions are malloc, calloc, realloc and free. Feel free to drop your comments, feedback and suggestions. For practice problems and more, visit: http://www.mycodeschool.com Like us on Facebook: https://www.facebook.com/MyCodeSchool Follow us on twitter: https://twitter.com/mycodeschool

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