🔧 Value type va Reference type

class Program
{
   static void Main(string args[])
   {
      int x = 10;
      int y = x;
      y = 20;
      Console.WriteLine(x);
   }
}

class Person
{
   public string Name;
}

class Program
{
   static void Main(string[] args)
   {
      Person p1 = new Person();
      p1.Name = "Alice";
      Person p2 = p1;
      p2.Name = "Bob";
      Console.WriteLine(p1.Name);
   }
}