Yes, every time you access a "serialized" property, the serialized data within the business object's CurrentDataTable is de-serialized and returned. If you type something like this:

MyBO.SerializedBitmap.Width = 50

the business object de-serializes the bitmap, and you set the width on the object that was just de-serialized. However, this line of code 1) does not obtain an object reference to the object that was just de-serialized and 2) does not re-assign the value of the modified bitmap object back to the serialized property (so, the modified bitmap is never re-serialized back into the data table). When working with a serialized field, you need to save an object reference to the object that was pulled out and put it back in to the property when you're done with it.

After reading your documentaion "Common Serialized Field Mistakes" my interpretation of this is that once you set a field to be serialized every time you access the field deserializes before you get the strong-type.

Doing this you have to make a local copy and use that. Please explain?

Tks