What is a null string? A string is null if it has not been assigned a value (in C++ and Visual Basic) or if has explicitly been assigned a value of null. Although the composite formatting feature can gracefully handle a null string, as the following example shows, attempting to call one if its members throws a NullReferenceException. C#.
Both asthma and vocal cord dysfunction can make breathing difficult. Signs and symptoms of either condition can include coughing, wheezing, throat tightness and hoarseness, but they're two separate disorders.Vocal cord dysfunction is the abnormal closing of the vocal cords when you breathe in or out. It's also called laryngeal dysfunction, paradoxical vocal cord movement disorder or paradoxical vocal cord motion. Like asthma, vocal cord dysfunction can be triggered by breathing in lung ...
The differential diagnosis for Vocal Cord Dysfunction, also referred to as paradoxical vocal fold motion (PVFM) and paradoxical vocal cord movement (PVCM), includes vocal fold swelling from allergy, asthma, or some obstruction of the vocal folds or throat.ocal cord dysfunction co-occurs with asthma approximately 40% of the time. This frequently results in a misdiagnosis of only asthma. Even young children can tell the difference between an asthma attack (primarily difficulty exhaling) and a VCD attack (primarily difficulty inhaling).