/// <summary>
/// Shallow copy an object
/// </summary>
/// <param name="fact"></param>
/// <returns></returns>
/// <remarks> Why not use object.MemberwiseClone() directly?
/// Because it will cause "The entity wrapper stored in the proxy does not reference the same proxy." error.
/// When you MemberwiseClone an EF-loaded entity, you're cloning the proxy class as well. One of the things a proxy class carries around is a reference to the wrapper fo the given entity. Because a shallow copy only copies a reference to the wrapper, you suddenly have two entities that have the same wrapper instance.At this point, EF thinks you've created or borrowed a different proxy class for your entity which it assumes is for purposes of mischief and blocks you.</remarks>
public static Fact Clone(Fact fact)
{
var newFact = new Fact();
newFact.Assign(fact);
return(newFact);
}