Possible null reference return.

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

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

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

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

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

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

Converting null literal or possible null value to non-nullable type.

Possible null reference argument for parameter 'source' in 'IEnumerable<DicomDictionary> Enumerable.Select<KeyValuePair<string, DicomDictionary>, DicomDictionary>(IEnumerable<KeyValuePair<string, DicomDictionary>> source, Func<KeyValuePair<string, DicomDictionary>, DicomDictionary> selector)'.