C# 中的空指標異常

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!");
}

上述程式碼將允許捕獲異常並使用catch處理它。

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