Format JObject as HTML

HtmlFormatter.cs

   public class HtmlFormatter
    {
        #region Public Methods

        public void Format(JObject item, TextWriter writer)
        {
            writer.WriteLine("<table>");

            foreach (JProperty property in item.Properties())
            {
                writer.WriteLine("<tr>");

                writer.WriteLine(Invariant($"<td>{property.Name}</td>"));

                writer.WriteLine("<td>");

                if (property.Value is JValue value)
                {
                    if (!value.HasValues)
                    {
                        writer.WriteLine("<i>null</i>");
                    }
                    else
                    {
                        writer.WriteLine(value);
                    }
                }

                if (property.Value is JObject obj)
                    Format(obj, writer);

                if (property.Value is JArray array)
                    Format(array, writer);

                writer.WriteLine("</td>");
                writer.WriteLine("</tr>");
            }

            writer.WriteLine("</table>");
        }

        public void Format(JArray array, TextWriter writer)
        {
            // get all column names by searching all objects in array for properties, and give each propertyname a column number.
            // write out column names
            // write out objects
        }

        #endregion
    }

Test.cs

 [TestClass]
    public class UnitTest1
    {
        #region Public Methods

        [TestMethod]
        public void TestMethod1()
        {
            HtmlFormatter f = new HtmlFormatter();

            Person p = new Person
                       {
                           Name = "Michael",
                           Id = 13,
                           Birth = DateTime.Now,
                           Child = new Child { Id = 29, Name = "Simon"}
                       };

            JObject obj = JObject.FromObject(p);

            using (StringWriter writer = new StringWriter())
            {
                f.Format(obj, writer);

                Console.WriteLine(writer.ToString());
            }
        }

        #endregion
    }

    public class Person
    {
        #region Public Properties

        public string Name
        {
            get;
            set;
        }

        public int Id
        {
            get;
            set;
        }

        public DateTime Birth
        {
            get;
            set;
        }

        public Child Child
        {
            get;
            set;
        }

        public string Null
        {
            get;
            set;
        }
        #endregion
    }

    public class Child
    {
        public string Name;
        public int Id;
    }