How to Overload a constructor and also call the base class constructor in C#?

Question

I am creating a C# error that should extend the class Exception but, should also add an extra property, thus:

public class CampoVazioErro: Exception
{
    public string campo { get; }

        public CampoVazioErro(object c)
        {
            campo = c;
        }
        public CampoVazioErro(object c, string m) : base(m)
        {
        }
        public CampoVazioErro(object c, string m, Exception i) : base(m, i)
        {
        }
}

Is it possible I call the base class builder Exception and also call the simplest builder in my class CampoVazioErro(object c)? In my opinion there must be some way to do this but I’m not finding on the internet.

Note: I know to call another builder within the same class I just have to pass the this() in front of another manufacturer (ex: CampoVazioErro(object c, string m): this(c) but I have no idea what to call it and also the builder of my superclass.

Answer 1

Exception classes should always end with the word Exception. You should inherit from ApplicationException and not Exception. In fact the latter should be forgotten by developers in general. And even for this I consider the third signature a mistake.

In general you should not use object as kind of nothing. This is practically a legacy of language.

These constructors have no direct relationship with the base constructors. Just warning if you think you have, not different signatures.

using System;

public class Program {
    public static void Main() {
        try {
            throw new CampoVazioException<int>(1);
        } catch (CampoVazioException<int>) {
            Console.WriteLine("deu erro");
        }
    }
}

public class CampoVazioException<T>: ApplicationException {
    public T Objeto { get; }

    public CampoVazioException(T objeto) : this(objeto, "") {}
    public CampoVazioException(T objeto, string mensagem) : base(mensagem) {
        Objeto = objeto;
    }
}

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.