How do I create custom exceptions in C#?

How do I create custom exceptions in C#?

To create a custom exception in C#, you can inherit from the built-in Exception class. Here's a simple example:

public class MyCustomException : Exception
{
    public MyCustomException(string message) : base(message) {}
}

Can I add additional properties to my custom exception?

Yes, you can add additional properties to your custom exception class. For example:

public class MyCustomException : Exception
{
    public int ErrorCode { get; }

    public MyCustomException(string message, int errorCode) : base(message)
    {
        ErrorCode = errorCode;
    }
}

How do I throw my custom exception?

You can throw your custom exception using the throw keyword. For example:

throw new MyCustomException("An error occurred", 404);

Can I catch my custom exception separately?

Yes, you can catch your custom exception separately using a try-catch block:

try
{
    // code that may throw an exception
}
catch (MyCustomException ex)
{
    Console.WriteLine(ex.Message);
}