DebuggerDisplay and DebuggerTypeProxy in Action

DebuggerAttributes.cs

// See https://aka.ms/new-console-template for more information

using System.Diagnostics;
using System.Threading.Channels;

var father = new Person
{
    Birthday = new DateTime(1970, 1, 1),
    Name = "Father McFatherson",
};
var mother = new Person
{
    Birthday = new DateTime(1971, 1, 1),
    Name = "Mother McMotherson",
};
var daughter = new Person
{
    Birthday = new DateTime(1991, 1, 1),
    Name = "Daughter McDaughterson",
    Father = father,
    Mother = mother,
};

// Set the breakpoint here and inspect the "daughter" variable
Console.Write(daughter);


[DebuggerTypeProxy(typeof(PersonDebugView))]
[DebuggerDisplay("{Name}'s Father: {Father.Name}")]
public class Person
{
    public DateTime Birthday { get; set; }

    public string Name { get; set; }

    public Person Father { get; set; }

    public Person Mother { get; set; }
}

public class PersonDebugView
{
    private string hidden = "I am not visible";
    private Person _person;

    public PersonDebugView(Person person)
    {
        _person = person;
    }

    public string Parents => $"Father: {_person.Father.Name} / Mother: {_person.Mother.Name}";

    public int Age => (DateTime.Now.Year - _person.Birthday.Year);
}