DateTimeKind is deserialized as Unspecified, using binary serialization.

[polenter]

DateTime with a defined Kind is not binary deserialized (Kind equals Unspecified).
The XML serialization works as expected.

Since additional information must be stored, the fix would result with breaking change in the serialization stream.
I suggest replacing DateTime against DateTimeOffset.

Originally posted by @AntiTenzor in #17 (comment)