The article discusses a recurring issue with Entity Framework 9 (EF9), specifically an exception thrown when using GroupBy alongside sorting. The exception message reads, "The given key 'EmptyProjectionMember' was not present in the dictionary." This problem appears when users try to sort the results after grouping, which signifies a possible bug in EF9. Some users reported encountering similar issues. Various workarounds were explored, but they often resulted in other exceptions, highlighting limitations in EF9's query handling and potential areas for improvement.
The given key 'EmptyProjectionMember' was not present in the dictionary.
There were attempts to use workarounds, yet most lead to other exceptions, indicating limitations in EF9's handling of queries.
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