C# 允许我们创建用户定义的或自定义的异常。它用于产生有意义的异常。为此,我们需要继承 Exception 类。
using System; public class InvalidAgeException : Exception { public InvalidAgeException(String message) : base(message) { } } public class TestUserDefinedException { static void validate(int age) { if (age < 18) { throw new InvalidAgeException("Sorry, Age must be greater than 18"); } } public static void Main(string[] args) { try { validate(12); } catch (InvalidAgeException e) { Console.WriteLine(e); } Console.WriteLine("Rest of the code"); } }
输出:
InvalidAgeException: Sorry, Age must be greater than 18 Rest of the code
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