Can i inherit static class in c

Active Oldest Votes. Citation from here : This is actually by design. Improve this answer. Lack of imagination on Torgersen's side, really. I had a pretty good reason for wanting to do this : — Thorarin. How about this? You could add to your project a Assert:NUnit. Assert class, and then add a Throws method. Problem solved. It's cleaner to use in the code too KonradMorawski It's impossible to write extension methods for static classes.

You misunderstood me here. What I meant is that the functionality required in the scenario described by user could be provided in future by as little as allowing extension methods for static classes.

No static inheritance necessary. That's why his scenario didn't strike me as a very good rationale for introducing static inheritance. If C was to be modified in this aspect, why go for a major redesign when a minor one would be just as good in practice. Learner That's not really fair. Net everything inherits from object , and everyone is expected to know that. So static classes always inherit from object , whether you specify it explicitly or not.

Show 4 more comments. Andrew Hare Andrew Hare k 68 68 gold badges silver badges bronze badges. He wants to know why this was done. Why is it sealed? This doesn't answer the question it all; it just restates the issue he was asking about. Well, the OP should have asked "Why are static classes sealed", not "Why can't I inherit from static classes?

This answer gets my vote. AlexBudovski: This answer is correct but as useless as a telling a lost person "you are in front of me" when they ask you "where am I".

Think about it this way: you access static members via type name, like this: MyStaticType. MyStaticMember ; Thus, the new item bears no relationships to the original when used in code.

So, in the end you don't really gain anything from inheriting static classes. Joel Coehoorn Joel Coehoorn k gold badges silver badges bronze badges. You cannot add methods to an existing static type via an extension method. Please see my comment on the accepted answer for an example desired use. MyStaticType — user It would probably even be possible to define a convention via which languages could do so in a fashion compatible with the current CLR e.

I found myself with a case where I believe inheriting a static class is the right thing to do, although obviously you can access them anyway. I have a static class for sending raw data streams to the printer for talking to industrial label printers. It has a bunch of windows API declarations. I now find myself writing another class for messing with printers which needs the same API calls. Not good.

Declare them twice? Good, but not permitted. Amit Amit 1 1 gold badge 6 6 silver badges 11 11 bronze badges. I have a generic loader that receives a class as type. That class has 5 helper methods and 2 methods that return a string name and description.

I might have picked it wrong I think so , but the only solution I found was to instantiate the class in the generic loader, to access the methods The alternative would be a giant dictionary, I guess.

Also, when you say "what you want to achieve" you should instead say "what you seem to be aiming for" or something similar. Yogesh Karekar Yogesh Karekar 31 1 1 bronze badge.

That's what is left to me. Can a class be static? So, Yes, you can declare a class static in Java, provided the class is inside a top level class. Such classes are also known as nested classes and they can be declared static, but if you are thinking to make a top level class static in Java, then it's not allowed.

Where static variables are stored? The static variables are stored in the data segment of the memory. The data segment is a part of the virtual address space of a program. All the static variables that do not have an explicit initialization or are initialized to zero are stored in the uninitialized data segment also known as the BSS segment.

How do you make a class static? A static nested class is a class within a class, in which the outer class can access static members of the nested class. In order to create an instance of the nested class, you need to reference the outer class, then the inner class.

When should a class be static? The advantage of using a static class is that the compiler can check to make sure that no instance members are accidentally added. The compiler will guarantee that instances of this class cannot be created. Why are static classes bad? So no, in general its not bad practice. Just use them wisely Static functions are more efficient than non-static because you don't need to create an instance of an object to use them or pass a 'this' pointer into method calls.

There's nothing wrong with static helper methods in a static class. How should the compiler decide to select the method to invoke? And as a valuable idea, littleguru has a partial "workaround" for this issue: the Singleton pattern. Static methods are resolved on the compile-time type of the variable.

If you change it to SubMain m A non-static inner class always keeps an implicit reference to the enclosing object. If you don't need that reference, all it does is cost memory. Consider this:. Child to parent class connection is simpler as it visually illustrates the variables and methods of each class. Static variables declared in member functions will keep their value between function calls. There will be only one copy over all instances , and all accesses to indicator from different instances will affect the same indicator.

This means indicator will only be initialized once. Example: C Static Class. Example: Accessing Static Members.

Try it. Example: Shared Static Fields. WriteLine StopWatch. Example: Static Method. Example: Static Constructor vs Instance Constructor. Example: Static Constructor Execution. DisplayInfo ;. Static members are stored in a special area in the memory called High-Frequency Heap. Static members of non-static classes are shared across all the instances of the class. So, the changes done by one instance will be reflected in all the other instances.