A simple EntityKey identifying an entity that resulted from a failed operation.
Assembly: System.Data.Entity (in System.Data.Entity.dll)
There are various ways to get an invalid entity. The most common scenario is when an Entity SQL query uses the operator to interpret an instance of a polymorphic type as a particular type, and the instance in question does not match. ( is similar to the C# as operator). In this case, the query returns an entity that is not valid, and the entity key of the resulting entity is set to.
Available since 3.5