Process completed with exit code 1.

The type 'T' cannot be used as type parameter 'TKey' in the generic type or method 'Dictionary<TKey, TValue>'. Nullability of type argument 'T' doesn't match 'notnull' constraint.

The variable 'warning' is assigned but its value is never used

Dereference of a possibly null reference.

Possible null reference argument for parameter 'records' in 'Task CsvWriter.WriteRecordsAsync<dynamic>(IEnumerable<dynamic> records, CancellationToken cancellationToken = default(CancellationToken))'.

The variable 'warning' is assigned but its value is never used

Dereference of a possibly null reference.

Possible null reference argument for parameter 'records' in 'Task CsvWriter.WriteRecordsAsync<dynamic>(IEnumerable<dynamic> records, CancellationToken cancellationToken = default(CancellationToken))'.

The variable 'warning' is assigned but its value is never used

Dereference of a possibly null reference.