组件的一些公共属性不希望被VS在设计时加到InitializeComponent()方法中怎么处理呢？我试过了，将属性加上[Browsable(false)]也不行。
我的代码如下：
    /// <summary>
    /// 控制器通讯类型下拉列表框。
    /// </summary>
    public class CommunicationTypeComboBox : ComboBox
    {
        /// <summary>
        /// 构造列表框实例。
        /// </summary>
        public CommunicationTypeComboBox()
        {
            Items.Add("串口");
            Items.Add("TCP");
        }

        /// <summary>
        /// 获取列表框中的所有项。
        /// </summary>
        [Browsable(false)]
        public new ObjectCollection Items
        {
            get { return base.Items; }
        }
    }

将控件放到窗体上，VS回自动在InitializeComponent()方法中加入一下代码。粗体部分。
 
            //
            // cmbCommunicationType
            //
            this.cmbCommunicationType.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
            this.cmbCommunicationType.FormattingEnabled = true;
            this.cmbCommunicationType.Items.AddRange(new object[] {
            "串口",
            "TCP"});
            this.cmbCommunicationType.Location = new System.Drawing.Point(124, 66);
            this.cmbCommunicationType.Name = "cmbCommunicationType";
            this.cmbCommunicationType.SelectedItem = Xunmei.Door.CommunicationType.SerialPort;
            this.cmbCommunicationType.Size = new System.Drawing.Size(121, 20);
            this.cmbCommunicationType.TabIndex = 2;
            this.cmbCommunicationType.SelectedIndexChanged += new System.EventHandler(this.cmbCommunicationType_SelectedIndexChanged);

随着编辑次数的增会变成这样。除了不在构造函数中增加项以外，有没有办法解决这个问题？
 
this.cmbCommunicationType.Items.AddRange(new object[] {
            "串口",
            "TCP",
            "串口",
            "TCP",
            "串口",
            "TCP",
            "串口",
            "TCP",