NullReferenceException is a C# version of NullPointerException. To handle and catch it in C#, use try-catch.
The below example shows that a variable is set to null and when we try to print it, it throws an exception that gets caught in the catch −
Try { a = null; Console.WriteLine(a); }catch (NullPointerException ex) { Console.WriteLine("Variable is Null!"); }
上述代码将允许捕获异常并使用catch处理它。
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