Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DXApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            UnboundRowsHelper helper = new UnboundRowsHelper(propertyGridControl1);
            helper.AddUnboundRow("UnboundInt", typeof(int));
            helper.AddUnboundRow("UnboundString", typeof(string));
            helper.AddUnboundRow("UnboundDateTime", typeof(DateTime));
            propertyGridControl1.RetrieveFields();
        }
    }

    public class SourceObject : Component
    {
        public string TestProperty { get; set; }
    }
}