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Problems with binary serialization

Hi,

I have a problem when I use BinaryFormatter with such a parameter
formatter.TypeFormat = FormatterTypeStyle.TypesWhenNeeded. It looks like when
it is used then OptionalField attribute does not work anymore so it is not
possible to load serialized files from the previous versions even with the
new fields marked as OptionalField.

When formatter.TypeFormat = FormatterTypeStyle.TypesAlways is used then
everything is OK. I could not find any description of such strange behavior
neither in MSDN nor in Internet. Is it a normal situation with binary
serialization or a bug?

Thank you.
Oct 2 '06 #1
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