Microsoft.Synchronization.Data.SqlServerCe.dll error

I am using .NET 3.5 in my windows application but I get the following error:

Assembly 'Microsoft.Synchronization.Data.SqlServerCe, Version=, Culture=neutral, PublicKeyToken=89845dcd8080cc91' uses 'System.Data.SqlServerCe, Version=, Culture=neutral, PublicKeyToken=89845dcd8080cc91' which has a higher version than referenced assembly 'System.Data.SqlServerCe, Version=, Culture=neutral, PublicKeyToken=89845dcd8080cc91'

How do I resolve it?
Lawrence AverySystem DeveloperAsked:
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David Johnson, CD, MVPOwnerCommented:
Go into your projects Reference and add a new reference of your dll file which is causing the problem and make sure that all your dlls are compiled against the same version

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Lawrence AverySystem DeveloperAuthor Commented:
My mistake I was removing
Microsoft.Synchronization.Data.SqlServerCe when I should of removed
System.Data.SqlServerCe and then replaced with  System.Data.SqlServerCe 3.5.1.

That was a stupid oops.
David Johnson, CD, MVPOwnerCommented:
We all make oops sometimes.. I've pored over code for hours until a team mate stopped buy to ask me if I wanted to go for coffee.  He glanced at the code and asked "why is this here?"
2 second glance and he found the bug. I bought him lunch!
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