Program.cs

#nullable enable

public static class JavaScriptExtensions
{
    public static IEnumerator<(string name, object? value)> GetEnumerator(this object js)
    {
        var properties = js.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public);
        foreach (var property in properties)
        {
            yield return (property.Name, property.GetValue(js));
        }
    }
}

public class Program
{
    public static void Main()
    {
        foreach (var (property, value) in DateTime.Now)
        {
            Console.WriteLine($"{property}: {value}");
        }
    }
}