Class ObjectContext belongs to following assembly
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System.Data.Entity
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System.Data.Objects
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System.Objects.Data
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System.Entity.Data
A
Correct answer
Explanation
The ObjectContext class belongs to the System.Data.Entity assembly in the Entity Framework. This assembly contains the core Entity Framework types including ObjectContext, EntityObject, and other fundamental classes. While ObjectContext works with objects conceptually, its actual implementation resides in System.Data.Entity.dll, not in System.Data.Objects or similarly named assemblies.