Nullability of reference types in return type of 'string? StorageSettings.StorageHost.get' doesn't match implicitly implemented member 'string IStorageSettings.StorageHost.get' (possibly because of nullability attributes).

Nullability of reference types in return type of 'string? StorageSettings.StorageLogin.get' doesn't match implicitly implemented member 'string IStorageSettings.StorageLogin.get' (possibly because of nullability attributes).

Nullability of reference types in return type of 'string? StorageSettings.StoragePassword.get' doesn't match implicitly implemented member 'string IStorageSettings.StoragePassword.get' (possibly because of nullability attributes).

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

The annotation for nullable reference types should only be used in code within a '#nullable' annotations context.

Cannot convert null literal to non-nullable reference type.

Cannot convert null literal to non-nullable reference type.

Nullability of reference types in return type of 'object? ContentControl.Content.get' doesn't match implicitly implemented member 'object INotificationMessageButton.Content.get' (possibly because of nullability attributes).