C# records inheriting from Exception

Install from NuGet: dotnet add package RecordException

Then define your exceptions like this:

using RecordExceptions; public record MissingIdException(int id): RecordException;

The exception message will automatically be MissingIdException: id = {id}. Probably fine for debugging, but if you want to customize that, you can:

public record MissingIdException(int id): RecordException { public override string Message => $"Id {id} is missing"; }

The message may also be specified in the construtor:

public record OperationCancelledException: RecordException("User has cancelled the operation.")

You can also wrap exception into InnerException, it might be useful for adding relevant information:

public record SomethingBad(Exception InnerException): RecordException("Something really bad has happened", InnerException);

Notes:

• If you are using some parameters in your message, prefer to override the Message property if you want the x with { Prop = newValue } syntax to work.
• Even when you provide your own message, all properties will be shown bellow the stacktrace. If you don't like this, public override string ToString() => base.ToString();.
• Don't be too surprised if this stops working with the next C# version 😅. Yes, records are not supposed to inherit from System.Exception. But they forgot to check base type of a base type ;)

License is MIT, so you can use it however you want to. If you need a record inheriting from another class, feel free to fork this repo.