NP109 Correct or Not

Thank you for your explanation.

The article is in fact correct - you will get "12345" because MyInt is a reference type not a value type.

Try it and see:

using System;

public class MyInt
{
   public int MyValue;
}

class Test
{
   static void Main()
   {
       Test t  = new Test();
       t.Go();
       Console.ReadKey();        
   }
  
   public void Go()
   {

      MyInt x = new MyInt();
      x.MyValue = 2;
      DoSomething(x);
      Console.WriteLine(x.MyValue.ToString());         

   }

   public void DoSomething(MyInt pValue)
   {
       pValue.MyValue = 12345;
   }

}