A quick prototype for a shallow copy of an object with changing values ;-)

WithForki.ps1

add-type @"
using System;
using System.Linq;

public class A {
  public A() { Age = 40; Name = "DerAlbert"; Type = "Original"; }
  public int Age { get; set; }
  public string Name { get; set; }
  public string Type { get; set; }
  public A With(object o) {
    var matches = from otherProperty in o.GetType().GetProperties()
    join myProperty in typeof(A).GetProperties() on otherProperty.Name equals myProperty.Name
    select new { Mine = myProperty, Yours = otherProperty };

    A clone = this.MemberwiseClone() as A;
    foreach (var match in matches)
      match.Mine.SetValue(clone, match.Yours.GetValue(o, null), null);

    return clone;
  }
}

public class O {
  public O() { Age = 30; Name = "forki"; Type = "Funky"; }
  public int Age { get; set; }
  public string Name { get; set; }
  public string Type { get; set; }
}

public static class Testing {
  public static A Anonymous() {
    A a = new A();
    return a.With(new {Name = "ilkerde", Age = 35, Type = "Dynamic"});
  }
}
"@ -lang csharpversion3

$o = new-object O
$a = new-object A

# @forki: is it that what you wanted? ;-)
$b = $a.With($o)
$c = [Testing]::Anonymous();

$a
$b
$c