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 ...
From Wikipedia, the free encyclopedia. Vocal cord dysfunction (VCD) affects the vocal folds, commonly referred to as the vocal cords, and is characterized by full or partial vocal fold closure that usually occurs for short periods during inhalation but can occur during both inhalation and exhalation.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).