using System;
public class Program
{
   static void Main(string[] args)
   {
      Derived d = new Derived();
      int i = 10;
      d.Func(i);
  }
}
public class Base
{
  public virtual void Func(int x)
  {
      Console.WriteLine("Base.Func(int)");
  }
}
public class Derived : Base
{
  public override void Func(int x)
  {
      Console.WriteLine("Derived.Func(int)");
  }
  public void Func(object o)
  {
      Console.WriteLine("Derived.Func(object)");
  }
}

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