Accessing a Private Constructor from Outside the Class in C#

Question

If I define a class with a private default constructor and a public constructor that has parameters, how can I access the private constructor?

public class Bo         


        

Answer 1

In additional to @jgauffin's answer which tells how to call private constructors via reflection:

Is it possible to change the modifiers of the private constructor?

It seems that you are implementing Factory Pattern in your code. Thus the modifier is supposed to be internal.

public class Product
{
   //others can't create instances directly outside the assembly
   internal Product() { }    
}
public class ProductProvider
{
   //they can only get standardized products by the provider
   //while you have full control to Product class inside ProductProvider
   public static Product CreateProduct()
   {
       Product p = new Product();    
       //standardize the product
       return p;
   }  
}

Extension methods

public static MyExt
{
   public static void DoSomething(this Product p) { }
}

Calling p.DoSomething() actually equals to MyExt.DoSomething(p). It's not putting this method into class Product.