How to create an object instance of class with internal constructor via reflection?

问题:

Example:

class Program {     static void Main(string[] args)     {         var myClass = Activator.CreateInstance(typeof(MyClass));     } }  public class MyClass {     internal MyClass()     {     } } 

Exception:

System.MissingMethodException

No parameterless constructor defined for this object.

Solution:

var myClass = Activator.CreateInstance(typeof(MyClass), nonPublic:true); 

I cannot understand, why I cannot create an instance inside the assembly with internal constructor. This constructor should be available inside the execution assembly. It should work like public for this assembly.

回答1:

It is not that impossible. you've to tell it is not a public.

var myClass = Activator.CreateInstance(typeof(MyClass), true);//say nonpublic 

回答2:

The constructor inside your MyClass is Internal try to change to public

public class MyClass {     public MyClass()     {     } } 

or

Pass true to CreateInstance

var myClass = Activator.CreateInstance(typeof(MyClass),true ); 

文章来源: How to create an object instance of class with internal constructor via reflection?