I have a c# object Design which has DesignSection child objects and each design section has a sequence number along with other properties. I am using automapper to map between objects and dtos.

Problem is when I map from dto to object or back the sequence number gets mixed between both DesignSection lists. e-g

DesignDto
DesignSectionDto1 -> Sequence -> 1
DesignSectionDto2 -> Sequence -> 2
DesignSectionDto3 -> Sequence -> 3

After mapping is done, it becomes:

Design
DesignSection1 -> Sequence -> 2
DesignSection2 -> Sequence -> 3
DesignSection3 -> Sequence -> 1

I have created the maps correctly probably a small thing thats missing to retain the order of Sequence.

Any help would be appreciated.