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Entity Framework Code First Error -- The provider did not return a ProviderManifestToken string

There are a couple of reasons for getting this error when using Code First approach in Entity Framework 

Reason 1: The name of the connection string does not match the name of the Entity Framework Context.
Example: The name of my EF context JobBoardContext does not match the name of the connection string which is JobBoard.





Reason 2: Entity Framework was unable to make a connection to the database. Take a look at the inner exception to get more details about the exception.

Check the inner details of the exception to know more details about the connection error















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