Video

Thanks - wasn't exactly what I was expecting - your example is effectively showing the mapping of output to a single Dto from multiple "dynamically" generated queries - I was hoping to see an example of Mapping to a dynamic Type which is only known at run time ... sigh

That's the very detailed demo I haven't seen in a while on Dispose pattern and Finalize. Thank you!

Where would you normally keep that JWT token? Keeping it in the session be easily found and decrypted to extract information from it. Is there a way to keep it only in memory completely invisible (using WASM)?

The reason List doesn't provide a AsSpan() method is, if the List grows, the inner array could be a different one than the one your Span is looking at. You can still get a Span over the inner array with CollectionMarshal.AsSpan(List). It comes with a warning that no items should be added or removed while the Span is in use.

Is string pooling part of string interning or it's a separate mechanisms?

One of the best tutorials I've ever seen on a specific topic. Kudos

Awesome! thanks!

The best video about delegates and events I have ever watched

Sooooo clear. Thanks a lot for this.

Many thanks for this wonderful clarification. Now I under the entire record, struct concepts.

Finally cs gets c++ style hard to read when talking about optimized code... Nice

All was good and informative up to the point you implement the "fast" parser using spans. That one was not good. You don't need to copy each number's characters to a stack allocated buffer just to pass them to double.Parse(Span<char>) - you could just do it with spans pointing inside the original string. That would avoid the risks of stack overflow you mentioned and will be slightly faster.

Why the 'Model' column is nullable in the database whereas the property is declared as non nullable in the Motocar class ? 10:30 thank you

Thank you for your clear and precise explanation. An old dog (me) learned a new trick today!

The explanations on this channel are excellent. Thank you!

Thank you very much.Very interesting topic

Awesome video ❤

The parellisation of the average() method doesn't give the same result : with parallelisation the result is 228150401,23158336 without parallelisation the method the result is 228150401,3512809.So an error is introduced

Parallel.ForEach(values, (value, _) => { results[value] = Factoriel(value % 20 + 1); usage.AddOrUpdate(Environment.CurrentManagedThreadId, 1, (_, count) => count + 1); } ); is working fine (value is the index) i didn't understand why you introduced the concurentBag collection for this loop

Many thanks❤ can we pass the token from the login response to the next request? We can set token to environment variable in Postman

Great one :)

You're underrated, Thank you

The task execution is never deferred, it is executed immediatly after being called ?! However, you can choice the place in the proogam where to wait it after being called ?! Can you tell me if i a wrong and why ? Thank you

it can also be canceled within the for loop first line like : for (int i=0; token.IsCancellationRequested == false && i < count; i++){ ..... and i think this approach is better for performance than allowing the for() to loop > then we return it with 0 if the IsCancellationRequested success. because here we are checking for the condition before the loop even start processing

I don't agree with making program.cs public just for integration test. you can new up a WebApplicationFactory instead of using another class which inherits it.

Great examples, thanks for sharing them,

Following this example but using a rest api on another port, my httpClient.PostAsync first does a GET OPTIONS and then fails without ever doing the post method with a http exception "Could not fetch" . Any ideas?

You are beyond wonderful!!!!! Thank you so much, this really helps

Just a question, what if same user logged in two different devices? For example, a user logs in first device; it will update the RefreshToken column for that user in AspNetUsers table. On device 2 login, it will update the existing RefreshToken column value(it will replace the device 1 refresh token with device 2 refresh token) .So for device 1, how will refresh token work?

What if I use no secret?

Gracias saludos desde Chile

This is a gem❤

Thanks for the video

Very nice video !! I would love to see more. Just for clarification, it is quite difficult to follow from where "ReportThread" is called while looking at the output. Could you add maybe do something like: void ReportCall([CallerMemberName]string methodName = null, [CallerLineNumber]int lineNumber = -1) { Console.WriteLine($"Thread ID: {Thread.Id} at {methodName} line {lineNumber}"); } That would make is easier (at least for me) to follow.

Really great video thank you!

These tutorials deserve 10 times more views than they currently have. Always clear and concise with no waffle. Many thanks, Jasper!

Ty <3 !!!! greating from Venezuela

I have a question. When I have a MAUI app as the client, for example, what is the best practice for the refresh flow to maintain a high user experience? Because when the access token is invalid, it would take six calls until I have the data if the token needs to be refreshed. So, should the token be refreshed in the background if it’s expired to maintain a high UX? Regards

1. They have to introduce vector math on arrays. Overloading operators +,*,-,/ create temporary objects. These in turn for long expressions and large vectors occupy as much extra memory as the number of extra temporaries. Fortran has it since decades ago, Zig has introduced it by scratch; it is unreasonable in 2024 C# not introducing vector math operations on arrays. 2. They should introduce a type for automatic differentiation (AD) build in the language so that 1st and 2nd order derivatives can be computed on the fly. 3. They have to introduce a feature for compile time code execution similar to Zig.

Great Video!

I have a question, but the topic is a bit different from Blazor. Basically, the question is about TypedReference in .NET (when we can/should use it) and about "hidden features" in c#, specifically __arglist and __makeref (again, when we can/should use them). I've done a some research, and you don't seem to have videos on these topics (

How can we return a Span from a function? Or any value type that has more than one field in it? In my understanding, when we return from a function, we pop the activation record, then pop the return address and follow it back to the caller. Since this pops the span from the stack, how do we use it in the calling function? With heap allocation, we can store a pointer in a register and use that to refer to the memory. Yet if we store a stack pointer to now unallocated memory, that wouldn't be good. So I'm really confused on how this would be used if returned from a function.

Finally i found a video where i learned the whole concept!

Wow! More than a year on since C#11 and I did not know about this feature. Really well explained thank you!

Such a great video

Best explanation yet on this topic I've seen

Hi Jasper, thanks again for your high quality videos! What happens when the user refresh the page in the summary page? Will the user still fetch the summary knowing that the JWt is still valid?

Hi Jasper, again thanks for a high quality content video!! I wonder, having the Clockskew within the gap of the Tiemespan defined in the validation parameters. Wouldn’t it be appropriate to make the refresh token endpoint protected with Authorize attribute and documenting that the refresh token endpoint must be called within X seconds/minutes of time span in order to generate a new JWT? So, instead of creating a logic for adding a column or attribute for Refresh Token in Users table, the clockskew is the key for refreshing a new JWT, thus the Authorize data annotation will do the work to validate the token. Thanks again for your videos, they are very helpful 💯

'System.IdentityModel.Tokens.Jwt' is a legacy tool :( are you going to update WebApi+Blazor wasm Auth tutorials?

Very glad I watched this video. I didn't know about the first method presented for using render fragments. Great stuff.