public void Core_Object_Fill()
{
var testItem = new MyClass1();
var fillItem1 = new MyClass2();
var fillItem2 = new MyClass3();
fillItem1.Fill(testItem);
fillItem2.Fill(testItem);
Assert.IsTrue(testItem.MyProperty == fillItem1.MyProperty);
Assert.IsTrue(testItem.MyProperty == fillItem2.MyProperty);
Assert.IsTrue(testItem.MyProperty != new MyClass2().MyProperty);
}