Assigning values to more then one property using Lambda expressions

I got an interesting question today. "Is it possible to assign values to more then one property in a collection. Using List.ForEach(Action<T>) and lambda expressions?"

Well how hard can that be so I naturally googled it, and came up with no usable results what so ever, I dont blame Google here might be me thats using the wrong search expression. The closest I could get was this article on MSDN: http://msdn.microsoft.com/en-us/library/bb397687.aspx

I dont think this is something you do every day, and I have a hard time figuring out why this was desireable but then again i did'nt ask.

First we need a class:

class test
{
  public int prop1 { get; set; }
  public int prop2 { get; set; }
}

Next a small console application:

class Program
{
  static void Main(string[] args)
  {
    List<test> l = new List<test>();
    l.Add(new test());
    l.Add(new test());
    l.ForEach(p => { p.prop1 = 2; p.prop2 = 4; });
    foreach (test item in l)
    {
      Console.WriteLine(item.prop1 + item.prop2);
    }
    Console.ReadLine();
  }
}