C# Events and Delegates Made Simple | Mosh

🔥Get the COMPLETE course (75% OFF - LIMITED TIME): bit.ly/2s3qkxn
Want to learn more from me? Check out these links:
Courses: codewithmosh.com
Blog: programmingwithmosh.com
Facebook: / programmingwithmosh
Twitter: / moshhamedani
Are you confused about events and delegates in C#? Watch this tutorial and your confusion will be gone in 30 minutes!
Check out my other C# video tutorials:
Debugging in Visual Studio
• Debugging C# Code in V...
Generics
• C# Generics Tutorial: ...

[@jakeowsley6552]

As a seasoned C++ developer, I don't know why events and delegates aren't explained this way: straightforward and uncomplicated. Thank you, Mosh.

[@arrrryyy]

He did not explain the basic but right away went to type of events standard code used only in winforms and webforms

[@eobardthawne6903]

​@@arrrryyywhat is at 1:00 ?

[@emzyempire658]

I couldn't agree more

[@Phcodesign]

Clear and uncluterred as usual. Mosh is one of my favorite teachers. I respect all my teachers, and so the Mosh! Thanks!

[@zithfrg]

One of the best tutorials I have ever seen in KZbin. You gained a new subscriber today. Keep up the good work man!

[@cyclewithjb]

Love how you basically started from nothing instead of started with the codes already in place. Always thankful for your generosity and willingness to teach other people.

[@sanfordhoffman2392]

I've looked at a lot of tutorials for events. This one did the trick for me. Broken down to its simplest form. Thank you very much Mosh.

[@MrRasZee]

mosh is fairly good, i always cross reference when i study

[@HingalshDealer]

same with me

[@JedaiSaboteur]

I've struggled with delegates and events for a long time and this is the tutorial that drove it home for me.

[@greenbear9790]

Even 7 years later after this video has been uploaded, I want to notice you that there are many people who are still confused about it. and there are many books and tutorial videos on youtube, but there is no such tutorial video that explains how to use it and why it's used that well and simple. This is one of the best and awesome tutorials I've ever met. thanks to your video, their people never need to buy a book for it.

[@shawnemartin3410]

This is great! I really appreciate that you took the time to first show the 'formal' way of doing it then showing the shortcut.. most would just show the shortcut!

[@lgfdecv4133]

This video has solved my question very well,I have been confused about events and delegates for several months and i try to understand them by reading books,but it is not easy to understand them fully until i meet this video, thank you,Mosh,Good job!

[@obo6261]

Dude this tutorial is sick, thank you so much. As a less experienced programmer, explaining this programming concept in detail without a heap of jargon made this superrrrr accessible

[@Andre-wu9fe]

To be honest, I never expected a tutorial this good when I felt like reading up on delegates and events again after feeling like I lacked in this area. This video was incredibly helpful, and explained the topic in a simple and the most uncomplexed way possible. Subscribed. Thank you.

[@ebayoscorner5512]

After three years in C#, I finally understand events and Delegates.....I have to go and refactor some codes....Many thanks Mosh......Greetings from Nigeria

[@biggs6466]

Years after the fact and this is still the best video that explains this subject. Thank you so much for your simple, no-nonsense explanation and easing the viewer into the more complex subject matter only *after* explaining the absolute basics.

[@sensans5238]

This actually helped me a lot, I have been struggling for hours. So simple and straight to the point. Thank you very much!

[@jonathantanu2209]

Thank you so much for explaining the concept of event-driven development utilizing delegate in C#. It has been a stressful time trying to understand what delegate is for and now I understand it. Once again, thank you.

[@scotmcpherson]

This is probably the best tutorial on events and event handlers....all the other's just whip right through each concept and it's nearly impossible to follow unless you already understand it...in which case you don't need the tutorial. You take the time to explain what each thing REALLY IS and the HOW and WHY that thing is important for creating a successful event.

[@mgeorgescu]

More C# tutorials sir, you are amazing.

[@jagroop31521]

This is called teaching skills , explained complex topi in simple way like int i =0;. Great job!!

[@purpleice2343]

*TRIGGER WARNING, ARGUING FOR THE SAKE OF ARGUING, it is also rhethorical question, tutorial is good* How am I supposed to know what int is and why I need ; at the end of line if I never looked at code before nor know what anything means?

[@gkjnsdfg454]

If you don't know what an int is or what the semi colon is for you shouldn't be learning about events and delegate...in fact you should be learning the absolute basics if you don't know what either of them are for. It would be like trying to learn to run, yet you can't even crawl..

[@purpleice2343]

Daniel Rosenbrock You shouldn't be on internet if you take everything seriously, fuck off.

[@gkjnsdfg454]

Mate I encounter many idiots on the daily just assumed you were one of them...now I know you are one of them :)

[@JordanMetroidManiac]

+Daniel Rosenbrock There wouldn't be any arguing if you just explained to him what they do instead of criticizing him. It's as simple as saying, "Semicolons indicate the end of each line. Ints are integers."

[@anhtuanle8318]

Man, my teacher spent hours explaining this, and i couldnt seem to grasp it, but with just merely 30mins of your video, i got it, thanks bro, appreciate it, this is simplicity at its finest

[@seanpenn6994]

Bro you have given me a new life by explaining this video on delegates and classes and resharper..i am so grateful..i wish i had the confidence to check this video out sooner..but i am hoping with your blessings i can find good work in software again..just low on confidence the last 2 and half years after losing my family and now getting to see my son once a week and for christmas and new years..you saved my life bro...grateful..god bless you...sorry for being overdramatic but such is life now..parents are the only ones who care about me and my son

[@patz540]

This was amazing exhibition of using delegates and events with a superb real time example.Amazing work.You have a new subscriber to your list :)

[@hikkenwayans]

EXCELLENT TUTORIAL!!!

[@k4kfh]

This saved my bacon. Thank you so much!!! I was so confused, especially about delegates, but you explained the relationship and all the syntax perfectly in simple examples without 100 lines of confusing extras.

[@Jolnichek]

I just made it through the course ..slowly... took hour and a half following along and making notes etc...I can actually say I completely understand this material. The cool thing is that you seem to anticipate listener questions as you teach. Just when I seemed to be getting a little confused you added the precise depth needed to bring me right back on course. Thank you!

[@MrToksvienas]

helped me instantly man!! Now I can see!!!!!!!!!!!!!!!!!

[@phjorland]

Very clear, thank you very much! Keep making videos like this- many, many thumbs up will follow

[@walkercase1836]

Same, I looked all over the MSDN website and it just didn't explain anything well. Thanks a ton man!

[@nailalzuhairi2690]

hmmmm , so what would you then say if u watch his Video about INTERFACES, showing that so many books and youtubers teaching the developers false concepts like ( INTERFACE is used for Multi-inheritance ).. If you are one of those who thing the INTERFACE is so , so I would strongly recommend you to watch his legendary Course "C# Intermediate Classes, Interfaces and OOP"

[@crabsynth3480]

Best Comment Ever ! :P

[@WholeNewLevel2018]

This is the Best Video on Events and Delegates ....... Thanks So Much ... and Pls keep up .....

[@pmcgktr]

I've been working on a feature in an app I'm doing for a client and literally spent 10 hours of jiggery pokery in the code with nothing working. 2/3rds of the way through the video and with a little tweaking I got the feature working!! 😭 Thank you so much you are a god send!!!!! 😭

[@ismaelsanchez3492]

I’ve seen many videos to try understand Events and Delegates, I can say this is the most clear, understandable and practical of them all. Congrats!

[@gunting]

Holy cat, this is the most clearest and easiest explanation to follow

[@douglascristhian7178]

Nice job! congrats from Brazil!

[@ThreeBeerMinimum]

OK, by far the best freaking Teacher out there. You took something complex and broke it down. I will be purchasing your course SIMPLE BECAUSE YOU DESERVE IT! whether my or my co-workers need it or not - you're getting it!

[@MelechFreedman]

I finally understand events!! Your amazing. I've Been programming for over ten years and avoiding events for as long as I can. Now I can create true uncoupled code. I've subscribed and set alerts!!!!!! Thank you!!!!!

[@Thoscellen]

Same as many other, you made Delegates and Events Crystal Clear to me :D. But, why have you used EventHandler over Func and Action ? What are the Pro and Cons ?

[@donfeto7636]

Thoscellen cuz of argument bro sender and eventarg are only in eventhander fun action predicate related to linq i think

[@datkidkizzle]

This is by far the best and most complete introductory tutorial for Delegates and Events that I have ever seen. You did a fantastic job of explaining all the different aspects of events, why they are useful, and I love how you started from a simpler design and then went back and added some more to it.

[@et379]

This video is great! I was reading so much on the internet about this, but the examples used, were not explained step by step as you do. Now I finally understood how to use events correctly and also learned a bit about delegates. Thanks!

[@ashishbhardwaj5908]

Mosh. You are a genius. In my entire career I didn't see so much easily explained video on such confusing subject Event and Delegate. Good Job...

[@MaamuBhanjiVines]

Events/Delegates is asked in every .NET interview and I have always shied away from this topic. I have an interview tom morning and can't wait to explain this exact same thing to the interviewer :p Thanks Mosh!

[@alexisbarrette7652]

So how did you do? Were you asked about delegates during the interview?

[@Gauravkumar-jm4ve]

Yea same with m I also shy from delegates

[@MaamuBhanjiVines]

I was able to defend my hold on events/delegates this time. Practical examples do help 👍

[@MasterTeeee]

To expand on this quickly: delegate = More or less a variable, but rather than storing data, it stores one or more methods, provided they adhere to the exact signature. event = Expands on delegate to provide protection for malicious code potentially being run... Things like the delegate being overriden or overloaded, and a few other things like that. Technically, this can all be done without using the event keyword at all. You can just add the other classes [the subscribers] to the delegate method, and when the publisher calls the delegate method, it runs through every method that has been stored in it. Just to give an actual explanation of what's going on here...

[@UmeshKumar-ox3zp]

At last I found one video which really explains what delegates and events are all about. I owe to you for this great video, Mr. Mosh.

[@wdujsub7902]

Excellent explanation! I had just a vague idea about how events come into existence and how they work, but I had no problem implementing events into my project and understanding it throughly after the video. The explanation was so clear that there was no need to pause, because everything was put so simply that it seemed that I knew it all along. Thank you.

[@akisey1]

This is some top quality teaching! Subscribed! +=

[@ArpanMukhopadhyay93]

hahaha nice

[@vitaliysakun-duvalko8946]

subscribers ++;

[@lucaschambe]

This tutorial was extremely helpful

[@ghazwan2568]

You were born a teacher man, my absolute favorite instructor and one of my reasons to pick .Net stack because you explain it very well greetings from Syria.

[@pebito]

Awesome! Thanks for posting this. Gotta watch it again a few times to get the hang of it though :)

[@SantoshMishra-rw6fy]

Very nice video, hard work is done to help others.Really different perrsonality

[@jasonchu852]

It is the best tutorial on c# "Events and Delegates" that I've ever seen!

[@kanzanaveed]

Okay so I was short on time and I had to write a code snippet using delegates and events. I found this 30 minutes video and some others but being aware of the simplicity of Programming with Mosh, I decided to watch this one. And after completing it "I am here to confirm that I now have a very clear and pretty good understanding of Events and Delegates and can write code using them". Hence, proved once again that Mosh Hamedani is one of the best teachers in explaining things at the most easiest level. Thank you so much, God bless!

[@viktoradamsky8319]

The best explanation I've ever seen on KZbin on this topic!!! Thanks! Cheers from Russia!

[@AonyjsViolmlar05]

If you were my college teacher i'm probably a software architect now.

[@Jorselfs]

Thank you so much Mosh, you're amazing. I was all day trying to figure this out until I found you. Your video is so easy to understand even for a non native english speaker like me. Definitely I'll visit your courses on udemy. Greetings from Chile.

[@gargkapil]

Best Explanation of Delegates and Events which i was looking for since a long time..... Thanks for explaining in such an wonderful way...

[@vipulzambare5329]

Best video to understand events and delegates.. Thanks!!!

[@newandroidfan]

Damn, you've taught this topic in less than 15 minutes and Tim Corey couldn't even do it in 40 minutes. Honestly, I'm disappointed in how Corey chose to explain this topic and Tim seems like he doesn't plan his videos, at least when he's trying to explain a intermediate concept.

[@mindblower113]

I don't remember I learned that much information within a 30 minute video with ease. Thanks big man!

[@nithinchandran7959]

After one year of programming, got the idea of events and delegates just a few minutes ago. Great teaching Mosh

[@cloud77hot40]

It’s 1am in my area, and I think I have to watch this video a few more times to understand everything and get ahead in my advance C# class. Great Video!

[@poboyinsamsara]

Ive been trying to get a clear explanation of how events work for weeks. Best explanation I have found. Thank you.

[@murphyochuba5340]

This is unarguably the best video I have seen on C# events and delegates. Very detailed and explanatory!

[@marcu54h]

Well recorded video. Voice isn't tiring. I watched all ads without shortcuts (not happens too often) to support the author. Thank You!

[@InfectionSaarg]

This is one of the nicest and well-explaining videos regarding programming in C# that I've found on KZbin. Would even say that it's Pluralsight-level, although it's free to watch. Thank you very much, keep up the good work!

[@ArmaghanUljamil]

Awesome video. I always gets confused when defining and raising events in C#. You have explained it very simply!! great job.

[@AJ-xd2wt]

studying c# in school now and could not get this right, you explain this so much better! thank you for the simple explanation.

[@klsjdflksjfd]

Thank you so much Mosh. This is the best delegate/event tutorial for C# I have seen. I had to watch the video twice but at the end of the second watching I had a strong understanding of these concepts. Thank you!

[@ahmedelwa2000]

و الله يا موش أي حد بيرشح أي حاجة من ناحيتك بفتحها و اتعلمها و أنا مغمض و كل مرة مش بتخيب ظني ♥ شكراً يا موش Thank you mosh ♥

[@sinanmuhamedagic6475]

was watching this video 1 hour before an uni deadline. you've saved me. thank you.

[@dawson12379]

Excellent and crystal clear explanation..btw i have gone through your full stack developer course on pluralsight. it's really good..

[@nomanali5220]

What i like for this guy, is doing things in super simple way, making complicated situations very easy.

[@senthilk396]

After 10 years , finally i understood what is Events and Delegates. Very clear explanation. Thank you 😊

[@AmitVerma-uc1fc]

Perfect......main part of this video is what was the need of events and delegates and you mention it very well that is to make loose connection between two or more entities...no body mentioned this point except how to implement it, and bla bla bla bla ..thanks a lot Mosh...

[@roydonk2878]

All of the other comments already said it, but let me repeat it: this is such a great tutorial/lecture. Thanks for the content!

[@owhondaowhonda-wopara509]

Thank you very very very much Mosh!!!! After lots of searches, this video goes straight to the point in a very simplified manner. You are awesome.

[@p.philippeaudet4608]

I loved the clean, clear explanation and the speed was perfect. A beautiful ability to deliver. I would love to see a tutorial on serializing and de-serializing classes

[@TheCodingKent]

Always struggle with the event and delegate. This video makes me understand them very well. Thank you so much.

[@HirakiSHIKI]

I've been struggling to understand the concept, and this video finally cleared up my misconceptions, thank you!

[@konstantinstaykov6523]

Hello Mosh, Thank you for explaining delegates and events so well. After watching few courses on Pluralsight I got the idea about delegates but it was difficult for me to somehow link them with an event. Invoking the delegate directly wasn't hard but didn't seem the right thing to do.

[@Bgroff]

A really great video on events in C#. I can now say I understand how events work. Wow, Mosh...excellent teaching!

[@saifmuslim9376]

I don't have better words than what Viktor said "The best explanation I've ever seen on KZbin on this topic!!! Thanks! Cheers from UK"

[@mattshu]

I watched this 7 months ago and only sort of understood the concept. I bought your Intermediate course on sale at Udemy and got to the INotificationChannel section which brought me back here to this video. Now I can fully comprehend it! Thanks again! :)

[@vamsi8669]

Finally and Finally I am able to get hold of events Thanks!!!

[@ChinmayPrasoon]

Dude that was awesome. I read this thing at so many places and still did not get the concept. U nailed it in my head. Million thanks :)

[@TomkhaDev]

Great tutorial, especially with showing the exact thing the EventHandler classes accomplish it finally clicked for me.

[@elineoosterloo3555]

There are so many tutorials that don't explain and just 'do'. Thanks for really explaining, I learned a lot.

[@emacid7091]

As a junior game dev i can say this helped me a lot. Thanks for your efforts

[@vikasrajput6135]

I am your student on udemy, your approach to explaining the complex topics is suberb. I have been looking for Tut's on delegates . Went though lot of them but tu hey were emm little difficult to understand. I didn't know u were on utube and this one does the trick for me, now I know where to look for .net Tut's on you tube. Thanks sir.

[@p3rks]

Finally I understand how these work.. Life save man, thanks! Subscribed.

[@sameeranavalkar9352]

Superb... I used to be always confused on tie up between event and delagates and how to invoke it. This video gave a very clear picture. Thank you Mosh

[@sudheshg]

thank u mosh . now i have clearly understood clearly what is the use of event handler and delegates to write a loosely coupled events for pub / sub pattern.

[@ezt1215]

Really good explanation of how to use an event. Nicely brought it all together when you replaced the initial delegate definition (at the start) with the EventHandler defiinition at the end. The only thing I would add is that many people might not understand the reason to actually use the keyword "event" in the VideoEncoder class. Removing this keyword will result in this code example to still work HOWEVER this keyword is still necessary. (basically it provides protection to the Event so as not to be abused by other outside objects).

[@derelicts9503]

I was trying to learn this from "C# in a Nutshell" book and that was kind of dry. This was a superb explanation, absolutely perfect teaching Mosh, thank you!

[@jagadeeshgr9508]

I've been searching for more than 1.5hr about events and finally found a video that explains properly about events

[@mbb720]

Man, it took me about an hour and a half to finish this because of all my rewinding and note taking... but I understand it! Great video!

[@patrickhe6978]

you are just amazing, man! so clear, vivid and you explain things in a proper speed. English is not my first language but I can understand you just fine.

[@antondementiev2188]

Mosh is a fantastic teacher! I can't get enough of his courses on Udemy. ))

[@joro353]

This is by far the best explenation of events and delegates. Great job Mosh!

[@MatthiasOtt-ty9zu]

Hi Mosh, thank you for this amazing tutorial. They way you presented the topic is great and made me stick to your video. You're not running through. Instead you show step by step very slowly and describe each piece from different perspectives with different words - often repeatedly. This helped me a lot to truly learn and understand the topic. Also starting with delegates and then come to EventHandler helped me to understand the differences. I subscribed and liked and added your channel to my personal "first search here" list ;)

[@jsfroese]

Your explanation of delegates in c# is great. I like how you keep my attention on what you are teaching with the changes in intonation and volume with your voice. I will have to check out your other videos. thanks.

[@sipi41]

Thanks Mosh, always so good! I did take your React course, I did abandon but it was because I did not see much utility if Blazor is coming... I would like to see you explaining Blazor, we need that!

[@sohailnaseer7251]

In-depth, Easy to understand the Scenario of Events & Delegates, i have seen lots of videos to understand some confusion but this is one of the best to explain this subject. And obviously, in my Software Engineering life, i always ping Sir Mosh to understand solutions in-depth.

[@brucehuang7957]

It is a great tutorial overall. Here is some summary from my understanding. First, we define the delegate and event in the publisher. Second, we raise the event in the publisher as well. Thirdly, we subscribe the event in the main function, by giving the statement (publisher.eventname+=subscriber.evenhandlername). Lastly, we implement the eventhandler in the subscriber.

[@swaminathan730]

clear explanation now I understand the generics. thank you so much.