https://learn.microsoft.com/en-us/dotnet/api/system.runtime.compilerservices.configuredtaskawaitable-1.configuredtaskawaiter.oncompleted?view=netframework-4.8.1&viewFallbackFrom=net-9.0
ConfiguredTaskAwaitableTResult.ConfiguredTaskAwaiter.OnCompleted Method...
Schedules the continuation action for the task associated with this awaiter.
method