How does LINQ behave when combined with async operations?

LINQ itself is synchronous, but providers like EF Core extend it with async execution methods.

LINQ does not natively support async iteration. Instead, async behavior is introduced via provider-specific extensions like ToListAsync or FirstOrDefaultAsync. Mixing synchronous LINQ with async operations incorrectly can lead to blocking calls, thread starvation, or deadlocks in ASP.NET environments.