设计器InitializeNewComponent中设置的值如何VS不自动添加代码

        
class MyDesigner : ControlDesigner
        {
            public override void InitializeNewComponent(
                IDictionary defaultValues)
            { 
                base.InitializeNewComponent(defaultValues);
//主要是这里设置默认路径，在设计时可以看到，
//但是在运行时应没有效果
//而且在属性设计器中更改了Text属性为其他值，在设计时也看到了，但是运//行后应看不到效果，找到InitializeComponent方法，也没有VS自动为其添加的代码
//this.FilePathTextBox.Text="设置的值";
//怎样才能设计时和运行时都可以
                (this.Control as FilePathTextBox).Text = DefaultPath;
            }
        }

using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace cjl.Win.Controls
{
    [Designer(typeof(MyDesigner))]
    public partial class FilePathTextBox : PathTextBox
    {
        static readonly string DefaultPath = @"C:\My.txt";
        public FilePathTextBox()
            : base()
        {
            Filter = "All Files|*.*";
            this.InitializeComponent();
            //this.Text = DefaultPath;
        }
        public bool CheckExists { get; set; }
        public string Filter { get; set; }
        protected override string SelectPath()
        {
            OpenFileDialog dialog = new OpenFileDialog();
            dialog.AddExtension = true;
            dialog.Filter = Filter;
            dialog.CheckFileExists = CheckExists;

            DialogResult result = dialog.ShowDialog();
            if (result != DialogResult.OK)
            {
                return null;
            }

            return dialog.FileName;
        }
        #region Designer
        class MyDesigner : ControlDesigner
        {
            public override void InitializeNewComponent(
                IDictionary defaultValues)
            { 
                base.InitializeNewComponent(defaultValues);
//主要是这里设置默认路径，在设计时可以看到，
//但是在运行时应没有效果
                (this.Control as FilePathTextBox).Text = DefaultPath;
            }
        }
        #endregion
    }
}

using System;
using System.ComponentModel;
using System.Drawing.Design;
using System.Windows.Forms;
using System.Windows.Forms.Design;

namespace cjl.Win.Controls
{
    public abstract partial class PathTextBox : UserControl
    {
        protected virtual string SelectPath()
        {
            return null;
        }
        public PathTextBox()
        {
            InitializeComponent();
        }
        [Category("杂项")]
        [Browsable(true)]
        [Bindable(true)]
        [Editor(typeof(FolderNameEditor), typeof(UITypeEditor))]
        public override string Text
        {
            get { return MyTextBox.Text.Trim(); }
            set { MyTextBox.Text = value; }

        }

        public bool OnlySelect
        {
            get { return MyTextBox.ReadOnly; }
            set { MyTextBox.ReadOnly = value; }
        }
        private void SelectButton_Click(object sender, EventArgs e)
        {
            string path = SelectPath();
            if (path == null)
            {
                return;
            }
            Text = path;
        }




    }
}