What's New in C# 11 | .NET Conf 2022

Take it to 11 with Dustin and Mads as they share the latest goodies of C#. Once again, the next version of C# brings new convenience, elegance and expressiveness to a codebase near you!
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[@SKRUBL0RD]

this language just keeps getting better and better and all of the quirky syntactical sugar is so juicy and inspiring and makes me want c# to take over as the primary language in all uses everywhere

[@KonstantineMuradov]

I know that feeling (=

[@ChristianHowell]

Every time I think I need to create some new package, C# adds it as a feature... The latest is talked about here, the Generic math.. A godsend especially in the switch format...

[@ramelandingdong]

Finally, static virtual interface members. Been waiting for this for years 🙏❤

[@obinnaokafor6252]

Great work team. When is Discriminated Union (DU) coming.

[@luislema3863]

That switch looks like the one you can find in rust language 😛, glad to see that now in C#.

[@DrNorbet]

I have a question around the "T.Zero" - I am used to using default(T) for types, can this still be done here? The default is presumably still zero as they are non-nullable value types?!

[@benjamininkorea7016]

The thing with the multi-quotes: this is an engineer solving a problem that nobody, EVER, will have. And if they DO have that problem, they deserve what they get. :D The other stuff, though, is very exciting.

[@ZakKohler]

This feature is the reason I've been using C#11 in preview. Using it can make test input for unit tests more human readable and therefore maintainable and a better source of documentation.

[@modernkennnern]

by multi-quotes, do you mean raw string literals? They are incredibly useful and a problem that people have had for years

[@ks1970in]

F# style syntax for discriminated unions please, and tail call optimisation.

[@obinnaokafor6252]

It must be idiomatic C#, yet very expressive.

[@XmooosX]

3:46 Did my man over here use a "" instead of string.Empty; :D

[@mrdza96]

They are absolutely the same.

[@Neme112]

There's no reason to use string.Empty.

[@modernkennnern]

@@Neme112 Functionally they're equivalent, but it makes the intent more clear.

[@Neme112]

​@@modernkennnern I don't think it does. There's nothing clearer than just making an empty string with empty quotes. It says exactly what it does.

[@modernkennnern]

@@Neme112 "​" and "" are not equivalent though, which could be a problem. (Hint, if you can't see the difference, it's because there's a zero-width space in there)

[@andrewp7497]

Very ugly code at 21:00, looking more like angular and not readable at all, bleuuugh.

[@luizpar]

I hate that you guys are dumbing down the language. It’s losing all it’s sense of structure. It’s really frustrating. Making the language more intellectually accessible doesn’t do any good in the long term, and you should know this. It only creates a false sense of understanding at the beginning, postponing the necessity to understand the basics, such as “using” directives, or namespaces, or classes, or even… the Main method!

[@emreaka3965]

take cs50 then use c#. problem solved.

[@andreasmewald2439]

IParsable where T : IParsable? can someone explain this ?!?!

[@krajekdev]

Read about "curiously recurring template pattern"

[@Robert-G]

Considering the vague Delphi kinship of C#: it is really great seeing an equivalent of Delphi’s virtual/abstract class methods getting a comeback to the netcoreapp clr. :-) with a few nice twists no less… they can still be called fully static with 0 overhead!

[@GSoftagon]

Is anyone still using Delphi? It is sad that this great programming language is no longer popular.

[@villesipola]

So still no semi-auto properties?

[@jonasaraldi]

"...just add one more (quote)" 24:00 NOOOOO, It's ridiculous.

[@modernkennnern]

Do you prefer \"\"\"? Is that more readable?

[@jonasaraldi]

@@modernkennnern No, I just didn’t like the solution presented… but It’s my opinion

[@modernkennnern]

@@jonasaraldi personally I think it's very clever and intuitive. It's a niche scenario - most often you just have 3 - but if you for some reason need 3 consecutive inside the string itself then you need another. For reference, if you want to string interpolate, you do the same "dance" - if there is a "{}" inside the string, then you need two "$$" before the string ($$"""......""")

[@csm-csm]

Well? How far is C# team from reimplementing all features Haskell in dotnet?

[@DamonAchey]

trying to figure out how to multiply by a constant not zero or one, hmmm.

[@ZakKohler]

Maybe you could multiply the static generic one by a scaler of a non-generic type?

[@DamonAchey]

@@ZakKohler I found T.CreateChecked(42) which will create a T type from a 42 constant. Looks funny but performs well.

[@daddy2claire]

6:45 Still wrapping my head around required optional attribute parameters 😁