Field 'Usage._free' is never assigned to, and will always have its default value 0

'BaseContainer.ContainerDto' hides inherited member 'Classes.ContainerDto'. Use the new keyword if hiding was intended.

Dereference of a possibly null reference.

Non-nullable property 'Id' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Because this call is not awaited, execution of the current method continues before the call is completed. Consider applying the 'await' operator to the result of the call.

Argument of type 'Dictionary<string, Func<Task>>' cannot be used for parameter 'collection' of type 'IEnumerable<KeyValuePair<string, Func<Task>?>>' in 'ConcurrentDictionary<string, Func<Task>?>.ConcurrentDictionary(IEnumerable<KeyValuePair<string, Func<Task>?>> collection)' due to differences in the nullability of reference types.