if some one declare private constructor then how to create the instance of that class and what will be the advantage or disadvantage.
when some one will declare static constructor.

If you get an error telling you that you cannot access a constructor because it is private you cannot make an instance of that class.

You will find that it won't make sense to create an instance of particular classes for your own purposes. Such classes are designed that way to avoid invalid use and in most cases are meant to be accesible as properties of other classes and serve no real purpose on their own.

If you find you cannot create an instance of a class then you will also find that you can get a reference to an instance of this class via a method or property. There is no way to access this constructor at all except from within the class itself if you are the author of the class.

Happy coding.  

____________________________
My boss is a Jewish Carpenter (Jesus Christ)


Brain Bench Certified VB.NET Developer

It is very uncommon that one would want to create a class and then make its constructor private. this means that objects cannot be created from the class defined. Perhaps when this is used is with special purpose classes in which the internal working of the class may not be tempered with. Here you would most probably want certain members of your class to be initialised whenever a reference to methods of the class is made.

This works with static member functions and the contsructor will therefore be used to initialise data members or properties that the static method uses. Thats about the advantadge i can think of.


____________________________
BrainBench ADO.NET and ASP.NET Certified Developer