IEditableObject,FormatterServicesを記録してください

[Serializable]
public class MyViewModel : IEditableObject
{
    [NonSerialized]
    private object[] _copy; 

    public MyViewModel()
    {
        Name = string.Empty;
    } 

    public int Age { get; set; } 

    public string Name { get; set; } 

    public void BeginEdit()
    {
        //take a copy of current state
        var members = FormatterServices.GetSerializableMembers(GetType());
        _copy = FormatterServices.GetObjectData(this, members);
    } 

    public void CancelEdit()
    {
        //roll back to copy
        var members = FormatterServices.GetSerializableMembers(GetType());
        FormatterServices.PopulateObjectMembers(this, members, _copy);
    } 

    public void EndEdit()
    {
        //discard copy
        _copy = null;
    }
}

FormatterServicesの方が面白いです