what is private constructor in c#

In C#, a private constructor is a constructor that can only be accessed from within the same class. It cannot be accessed from outside the class, even by derived classes.

A private constructor is typically used to restrict the creation of instances of a class to within the class itself. This can be useful in situations where a class should have a limited number of instances, or where all instances should be created through a factory method or singleton pattern.

Here’s an example of a class with a private constructor:

public class MyClass
{
    private MyClass()
    {
        // Private constructor
    }

    public static MyClass CreateInstance()
    {
        return new MyClass();
    }
}

In this example, the constructor for MyClass is marked as private, so it can only be called from within the MyClass class itself. However, the CreateInstance method can be used to create instances of the class from outside the class.

Using a private constructor can help to enforce good design practices and prevent unwanted instantiation of a class.

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