How do I implement a custom exception

In C#, you can implement a custom exception by inheriting from the built-in System.Exception class. This allows you to create exceptions that are specific to your application’s needs. Below is an example of how to create and use a custom exception.


    using System;

    // Define a custom exception
    public class CustomException : Exception
    {
        public CustomException(string message) : base(message) { }
    }

    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                throw new CustomException("This is a custom exception message.");
            }
            catch (CustomException ex)
            {
                Console.WriteLine($"Caught custom exception: {ex.Message}");
            }
        }
    }