ConstructorHandling setting

public class Website
{
    public string Url { get; set; }

    private Website()
    {
    }

    public Website(Website website)
    {
        if (website == null)
        {
            throw new ArgumentNullException(nameof(website));
        }

        Url = website.Url;
    }
}

string json = @"{'Url':'http://www.google.com'}";

try
{
    JsonConvert.DeserializeObject<Website>(json);
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
    // Value cannot be null.
    // Parameter name: website
}

Website website = JsonConvert.DeserializeObject<Website>(json, new JsonSerializerSettings
{
    ConstructorHandling = ConstructorHandling.AllowNonPublicDefaultConstructor
});

Console.WriteLine(website.Url);
// http://www.google.com