LINQPad Object Dumper

Dumper.cs

using System.Diagnostics;
using System.IO;

namespace MyApp
{
    public static class Dumper
    {
        public const string DumpFile = "dump.html";

        public static void Dump<T>(this T o) {
            var localUrl = DumpFile;
            using (var writer = LINQPad.Util.CreateXhtmlWriter(true, 1))
            {
                writer.Write(o);
                File.AppendAllText(localUrl, writer.ToString());
            }
        }

        public static void Clear()
        {
            File.WriteAllText(DumpFile, string.Empty);
        }

        public static void Show()
        {
            Process.Start(DumpFile);
        }
    }
}

Usage example:

    internal class Program
    {
        public static void Main(string[] args)
        {
            var list = new List<string>();
            list.Add("one");
            list.Add("two");
            list.Add("three");

            Dumper.Clear();

            list.Dump();
            list.Add("four");
            list.Dump();

            Dumper.Show();
        }
    }