MongoDb C# normal property to versioned property automatically - mongodb

Question

I have this implementation of versioned property
public class VersionedProperty<T>: Dictionary<int, T>, IParentEntityTracker //where T:IComparable<T>
{
[BsonIgnore]
public IVersionableEntity ParentEntity { get; set; }
public VersionedProperty()
{
}
public VersionedProperty(IVersionableEntity parentEntity)
{
ParentEntity = parentEntity;
}
public T Value
{
set
{
var curVal = Value;
if (EqualityComparer<T>.Default.Equals(curVal, value))
return;
ParentEntity.AtLeastOneVersionedPropertyModified = true;
this[ParentEntity.Version + 1] = value;
}
get
{
var key = ParentEntity.Version + (ParentEntity.AtLeastOneVersionedPropertyModified ? 1 : 0);
var keys = Keys.Where(k => k<=key).ToList();
if (!keys.Any())
return default(T);
var max = keys.Max();
T res;
TryGetValue(max, out res);
return res;
}
}
}
Initially I created some property in the document as not versioned. Let say
public class Product
{
public Decimal Price{get;set;}
}
after some time I realized that I did mistake and I should use versioned property
public class Product
{
public VersionedProperty<Decimal> Price{get;set;}
}
What I would like is that old value in the existing document automatically deserialized into this versioned property to avoid writing update queries on the collection.
Is it possible somehow interfere with the process of deserializing?
May be this can help: I use postsharp to create empty instance of versioned property for autoproperties. My postsharp aspect also assigns reference of a parent entity to ParentEntity property of that newly created empty instance of the versioned property.