The using directive for 'ReasnAPI.Exceptions' appeared previously in this namespace

The using directive for 'Microsoft.EntityFrameworkCore' appeared previously in this namespace

Nullability of reference types in type of parameter 'keyValues' doesn't match overridden member.

'FakeDbSet<T>.GetAsyncEnumerator(CancellationToken)' hides inherited member 'DbSet<T>.GetAsyncEnumerator(CancellationToken)'. To make the current member override that implementation, add the override keyword. Otherwise add the new keyword.

Type parameter 'T' has the same name as the type parameter from outer type 'FakeDbSet<T>'

Possible null reference return.

Possible null reference return.

Dereference of a possibly null reference.

The using directive for 'ReasnAPI.Exceptions' appeared previously in this namespace