object/lepeintre/1 matches the site

public static HumanMadeObject LePeintre_1_Destruction()
{
    var lepeintre = new HumanMadeObject()
        .WithContext()
        .WithId("https://linked.art/example/object/lepeintre/1")
        .WithLabel("Le Peintre by Picasso")
        .WithClassifiedAs(Aat.Painting, Aat.TypeOfWork);

    var destruction = new Destruction()
        .WithLabel("Destruction of Le Peintre");
    destruction.TimeSpan = new LinkedArtTimeSpan
    {
        BeginOfTheBegin = new LinkedArtDate(new DateTimeOffset(1998, 9, 2, 22, 20, 0, TimeSpan.Zero)),
        EndOfTheEnd = new LinkedArtDate(new DateTimeOffset(1998, 9, 2, 22, 40, 0, TimeSpan.Zero))
    };
    lepeintre.DestroyedBy = destruction;

    return lepeintre;
}

• Metatype classification The second argument classifies the first, not the object: WithClassifiedAs(Aat.Description, Aat.Statement) says this is a Description, and Description is a kind of Statement. The Plain C# form shows the nesting.

var humanMadeObject = new HumanMadeObject
{
    Context = ["https://linked.art/ns/v1/linked-art.json"],
    Id = "https://linked.art/example/object/lepeintre/1",
    Label = "Le Peintre by Picasso",
    ClassifiedAs =
    [
        new Type("http://vocab.getty.edu/aat/300033618", "Painting")
        {
            ClassifiedAs = [Aat.TypeOfWork],
        },
    ],
    DestroyedBy = new Destruction
    {
        Label = "Destruction of Le Peintre",
        TimeSpan = new LinkedArtTimeSpan
        {
            BeginOfTheBegin = new LinkedArtDate(1998, 9, 2, 22, 20, 0),
            EndOfTheEnd = new LinkedArtDate(1998, 9, 2, 22, 40, 0),
        },
    },
};

Generated from the object the example builds: every property that is set, as object initialisers, with the vocabulary constants where a term is in the registry. The fluent helpers are a convenience, not a requirement; this form and the one as written produce the same JSON.