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Editorial Team
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Asked: 2026-05-28T00:39:46+00:00

I am trying to persist a workflow that has a EF POCO in it

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I am trying to persist a workflow that has a EF POCO in it as a variable. When I try to persist (and workflow is trying to serialize the object), I get an error:

Type ‘System.Collections.Generic.ICollection`1[MyObject]’ cannot be
serialized. Consider marking it with the DataContractAttribute
attribute, and marking all of its members you want serialized with the
DataMemberAttribute attribute. If the type is a collection, consider
marking it with the CollectionDataContractAttribute. See the
Microsoft .NET Framework documentation for other supported types.

Any ideas how to get around this?

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1 Answer

  1. Editorial Team

    I found the answer here:

    Get serialization error when try and submit EF4 entity via WCF

    It turns out the FixupCollection (in Entities.tt) does not have the DataContract attribute. Once I added that, the issue was resolved.

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