C#•11mo ago

✅ ! vs != and not operators in C#

Hello guys, can someone explain what's the difference between the ! and != operator in C# please.

Also, I noticed that C# has a not operator in pattern matching; is it related to the ! or !=?

For example here, my IDE is telling me to use "negated pattern"; this mean to use the not keyword?

Pobiega•1/26/25, 8:04 AM

! Inverts a Boolean value

Pobiega•1/26/25, 8:04 AM

!= Is "not equal"

FakerOP•1/26/25, 8:05 AM

yep I see, what about the not pls

Pobiega•1/26/25, 8:07 AM

Well yeah, not is related

PPobiega Well yeah, not is related

FakerOP•1/26/25, 8:10 AM

hmm related to both != and ! ? Is it the same thing as both operator in this case?

Pobiega•1/26/25, 8:13 AM

Ofc not

Pobiega•1/26/25, 8:13 AM

Those are not the same, so how could not be

FakerOP•1/26/25, 8:13 AM

ah true

Pobiega•1/26/25, 8:14 AM

Why not just read the documentation on patter.n matching?

FakerOP•1/26/25, 8:14 AM

yeah I started a bit

, will just finish it

FakerOP•1/26/25, 8:14 AM

Will come back if I have some doubts

PPobiega Why not just read the documentation on patter.n matching?

FakerOP•1/26/25, 8:36 AM

I read that the not is a "logical pattern"; can we say it's the same thing as the "!" then ?

FakerOP•1/26/25, 8:36 AM

just it's more readable/user-friendly ?

Pobiega•1/26/25, 8:36 AM

its only available in pattern matching

FakerOP•1/26/25, 8:37 AM

and it's use with is

FakerOP•1/26/25, 8:37 AM

yeah I see

Pobiega•1/26/25, 8:37 AM

you cant do if(x is not y)if(x is not y) for example

FakerOP•1/26/25, 8:37 AM

yep noted, we should use pattern matching syntax, like if (x is not . . .)

Pobiega•1/26/25, 8:37 AM

FakerOP•1/26/25, 8:38 AM

I mean, the "is" is a pattern matching keyword

Pobiega•1/26/25, 8:38 AM

yes

FakerOP•1/26/25, 8:38 AM

We can use the not together with "is" in this case

Pobiega•1/26/25, 8:38 AM

it can ONLY be used together with isis

FakerOP•1/26/25, 8:38 AM

oh ok, noted, thanks !

✅ ! vs != and not operators in C#

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