public static class

[Tony Johansson]

Hello!

I have a class where all the members are static so I change the class to be
static but I have
run into one small problem and that is how do I code to prevent calling the
C-tor because
there is no point in creating an instance because all the members are
static.

For example I can't code private class XX because the class cannnot have
instance C-tor.

//Tony

[Jon Skeet [C# MVP]]

On Oct 1, 8:34*am, "Tony Johansson" <[e-mail]:

I have a class where all the members are static so I change the class to be
static but I have run into one small problem and that is how do I code to
prevent calling the C-tor because
there is no point in creating an instance because all the members are
static.

For example I can't code private class XX because the class cannnot have
instance C-tor.

Static classes don't have constructors at all. The compiler doesn't
emit a default parameterless constructor for you. That's one of the
benefits of static classes.

Jon

[Peter Duniho]

On Wed, 01 Oct 2008 00:34:19 -0700, Tony Johansson
<t.*********@logica.comwrote:

Hello!

I have a class where all the members are static so I change the class to
be static but I have
run into one small problem and that is how do I code to prevent calling
the C-tor because
there is no point in creating an instance because all the members are
static.

For example I can't code private class XX because the class cannnot have
instance C-tor.

Right. But you also should not be able to instantiate a static class.

Do you have a code sample that violates that rule? That is, it allows you
to "new" an instance of a static class? The compiler should be preventing
it from happening for you. If it doesn't, that would be a bug.

Pete

[jacky kwok]

Peter Duniho wrote:

On Wed, 01 Oct 2008 00:34:19 -0700, Tony Johansson
<t.*********@logica.comwrote:

>Hello!

I have a class where all the members are static so I change the class
to be static but I have
run into one small problem and that is how do I code to prevent
calling the C-tor because
there is no point in creating an instance because all the members are
static.

For example I can't code private class XX because the class cannnot
have instance C-tor.

Right. But you also should not be able to instantiate a static class.

Do you have a code sample that violates that rule? That is, it allows
you to "new" an instance of a static class? The compiler should be
preventing it from happening for you. If it doesn't, that would be a bug.

Pete

Can you add the "Abstract" to the class?

I think you can add "static", that means there will be no any derived
class from this class.
Add "Abstract" to prevent any instance of the class and you can still
call any static function of the class.

--
Jacky Kwok
jacky@alumni_DOT_cuhk_DOT_edu_DOT_hk

[Peter Duniho]

On Wed, 01 Oct 2008 19:23:28 -0700, jacky kwok <ja***@nospam.nospamwrote:

Can you add the "Abstract" to the class?

No, that would make no sense.

I think you can add "static", that means there will be no any derived
class from this class.

No, static means that there are no instance members in the class.

Add "Abstract" to prevent any instance of the class and you can still
call any static function of the class.

A static class already cannot be instantiated. There's no need to add
anything else, even if you could add "abstract", which you can't.

Pete