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 ...
Common vocal cord disorders include: Vocal cord nodules. These are small, hard, callus-like growths caused by vocal abuse. They occur in pairs, with one nodule on each vocal cord at the site of greatest irritation. They sometimes are called singer's, screamer's or teacher's nodules. Vocal cord polyps. Polyps are small, soft growths that usually appear alone on a vocal cord. They are caused most often by vocal abuse or long-term exposure to irritants, such as chemical fumes or cigarette smoke.