Change the height of a PropertyGrid's description area

grid.GetType().InvokeMember("OnLayoutInternal", BindingFlags.InvokeMethod | BindingFlags.NonPublic | BindingFlags.Instance, null, grid, new object[] { false });

ResizeDescriptionArea(ref grid1, 6);

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

namespace wpropertygrid
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            
        }

        private bool ResizeDescriptionArea(ref PropertyGrid grid, int nNumLines)
        {
            try
            {
                System.Reflection.PropertyInfo pi = grid.GetType().GetProperty("Controls");
                Control.ControlCollection cc = (ControlCollection)pi.GetValue(grid, null);

                foreach (Control c in cc)
                {
                    Type ct = c.GetType();
                    string sName = ct.Name;

                    if (sName == "DocComment")
                    {
                        pi = ct.GetProperty("Lines");
                        pi.SetValue(c, nNumLines, null);

                        System.Reflection.FieldInfo fi = ct.BaseType.GetField("userSized",
                            //System.Reflection.BindingFlags.Instance,
                            System.Reflection.BindingFlags.NonPublic);

                        fi.SetValue(c, true);
                    }
                }

                return true;
            }
            catch (Exception error)
            {
#if(DEBUG)
                MessageBox.Show(error.Message, "ResizeDescriptionArea()");
#endif

                return false;
            }

        }

        private void button1_Click(object sender, EventArgs e)
        {
            ResizeDescriptionArea(ref propertyGrid1, 20);

        }
    }
    
}

namespace wpropertygrid
{
    partial class Form2
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            this.propertyGrid1 = new System.Windows.Forms.PropertyGrid();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // propertyGrid1
            // 
            this.propertyGrid1.Location = new System.Drawing.Point(36, 42);
            this.propertyGrid1.Name = "propertyGrid1";
            this.propertyGrid1.Size = new System.Drawing.Size(130, 130);
            this.propertyGrid1.TabIndex = 0;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(189, 73);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form2
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(292, 266);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.propertyGrid1);
            this.Name = "Form2";
            this.Text = "Form2";
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.PropertyGrid propertyGrid1;
        private System.Windows.Forms.Button button1;
    }
}

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace wpropertygrid
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form2());            
        }       

    }
}