Hi!
I'm trying to play with EF 4.0 and Firebird .NET Provider and have such 
problem which i can't solve.

A have an entity object (Manufacturer) materialized by some 
ObjectContext. I need to edit this object. For editor i'm creating new 
ObjectContext, pass EntityKey of my manufacturer and trying to 
materialize same manufacturer in this new context using entity key:

ObjectContext.GetObjectByKey(editedObjectKey);


And instead of object i'm getting an exception:

System.InvalidOperationException: Object mapping could not be found for 
Type with identity 'JewelyModel.Manufacturer'.
    at 
System.Data.Metadata.Edm.MetadataWorkspace.ImplicitLoadFromEntityType(EntityType
 
type, Assembly callingAssembly)
    at System.Data.Objects.ObjectContext.GetObjectByKey(EntityKey key)


What can it be? I can't find the solution :-(


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