How to figure out what exact entity resulted in DbContext.SaveChanges FK conflict failure - sql-server

Question

With Entity Framework Core (in case it matters, I'm using version 2.2), I update a number of entities in the DB context and call SaveChanges. In case saving fails because of the foreign key issue, I can't figure out what exact entities have foreign key issues. Is it possible to figure this out?
When Foreign Key conflict happens, SQL Server returns an error with code 547 and text The UPDATE statement conflicted with the FOREIGN KEY constraint "<Constraint>". The conflict occurred in database "<Database name>", table "<Table name>", column '<Column name>' without reference to exact invalid rows.
I have looked at DbUpdateException properties, but no luck:
var dbUpdateEx = ex as DbUpdateException;
var erroredEntries = dbUpdateEx.Entries;
// The documentation says that Entries property "Gets the entries that were involved in the error",
// but in my case it's always empty.
Also, I have tried validating entities manually before save, but such validation does not find FK conflicts. Code sample:
var valProvider = new ValidationDbContextServiceProvider(dbContext);
var valContext = new ValidationContext(entity, valProvider, null);
var entityErrors = new List<ValidationResult>();
var result = Validator.TryValidateObject(entity, valContext, entityErrors, true);
When I save more than 100 records and the save fails because of FK conflict in a single entity, it's quite frustrating to look for this single invalid record by hand.