SerializationException on Catel auto create of ViewModel with EF Entity Model

Question

When Catel attempts to auto create an instance of the ViewModel class belonging to a view I get a SerializationException complaining that System.Data.Entity.DynamicProxies is not expected. The Model is an EF 6.1 Entity (inherits from ModelBase) and I am using Catel 3.9. How do I prevent this ?

Geert van Horrik Geert van Horrik · Accepted Answer · 2014-09-19T07:46:59

Note: this all applies to Catel 4.0 (latest prerelease versions, since that is stable and has much improvements).

Catel serializes the model for the purpose of the IEditableObject implementation. When using the Model attribute, it tries to serialize the members. You have 2 options:

Use the [Model(SupportedIEditableObject = false)] (but you will lose the "automatic cancel" functionality
Decorate the failing members with [ExcludeFromSerialization] or use a custom serializer modifier

SerializationException on Catel auto create of ViewModel with EF Entity Model

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