how to return the opposite value of bool?

[Tee]

Hi,

In VB, we have something called "not" ...
MessageBox.Show(not object.Visible) will return true if it's false and vice
versa.

is there any way we can do the same in c# ?
I tried to use !, but it doesn't work ...
Anyone can help?

Thanks,
Tee

 

[Dennis Myrén]

'!' really should do it.

bool b = true;
Console.WriteLine(! b);

 

[Arild Bakken]

One way would be:

(boolVariable == false)

Arild

 

[Jon Skeet [C# MVP]]

In VB, we have something called "not" ...
MessageBox.Show(not object.Visible) will return true if it's false and vice
versa.

is there any way we can do the same in c# ?
I tried to use !, but it doesn't work ...

It should work, although you'll need to convert the bool to a string,
of course. ! is definitely the operator you're after.

 

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

Try
MessageBox.Show( (!object.Visible).ToString() );

It should work fine

Cheers,

 

[Tee]

Thank you all for the reply.
I got it to work, previously just don't know why it won't work.

Thanks