Private Constructor

When you declare a Constructor with Private access modifier then it is called Private Constructor. We can use the private constructor in singleton pattern.

If you declare a Constructor as private then it doesn't allow to create object for its derived class, i.e you loose inherent facility for that class.

In the following program I'm trying to create a derived class  for the Base class having Private constructor it shows an error like .

   Error: parent()  is inaccessible due to its protection level   

Use public instead of private then  the following program works...

class parent     {        public  string name;        private   parent()        //use public instead of private then this program works...         {             this.name = "Radha";         }     }     class child : parent     {         public void show()         {             Console.WriteLine(name);         }     }     class Program     {         static void Main(string[] args)         {             child obj = new child();             obj.show();             Console.Read();         }     } } // Error :: parent()' is inaccessible due to its protection level