'Registry' does not contain a definition for 'Repositories' and no accessible extension method 'Repositories' accepting a first argument of type 'Registry' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Descriptor' and no accessible extension method 'Descriptor' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Descriptor' and no accessible extension method 'Descriptor' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Descriptor' and no accessible extension method 'Descriptor' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

'(Descriptor, Stream)' does not contain a definition for 'Stream' and no accessible extension method 'Stream' accepting a first argument of type '(Descriptor, Stream)' could be found (are you missing a using directive or an assembly reference?)

Non-nullable property 'Registry' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Repository' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'Reference' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'ManifestMediaTypes' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'ManifestMediaTypes' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'ManifestMediaTypes' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Non-nullable property 'ManifestMediaTypes' must contain a non-null value when exiting constructor. Consider declaring the property as nullable.

Dereference of a possibly null reference.

Dereference of a possibly null reference.