如何去掉TabControl控件默认添加的TabPage

把TabControl添加到设计器的时候，默认会添加两个TabPage，当继承TabControl自定义控件的时候，这两个默认的TabPage常常会制造一些麻烦，今天我来介绍一种方法来去掉这两个默认的TabPage：
实际上思路比较简单，主要是通过ToolboxItem特性提供自定义的ToolboxItem类来修改工具箱中的控件的初始化工程，只需要继承ToolboxItem类，重写CreateComponentsCore方法就可以实现了：
    [ToolboxItem(typeof(DemoToolboxItem))]
    public class MyTabControl : TabControl
    {
    }


    [Serializable]  //ToolboxItem必须是可序列化的
    class DemoToolboxItem : ToolboxItem
    {
        // The add components dialog in VS looks for a public
        // ctor that takes a type.
        public DemoToolboxItem(Type toolType)
            : base(toolType)
        {
        }

        // And you must provide this special constructor for serialization.
        // If you add additional data to MyToolboxItem that you
        // want to serialize, you may override Deserialize and
        // Serialize methods to add that data.  
        DemoToolboxItem(SerializationInfo info, StreamingContext context)
        {
            Deserialize(info, context);
        }

        // This implementation sets the new control's Text and
        // AutoSize properties.
        protected override IComponent[] CreateComponentsCore(
            IDesignerHost host,
            IDictionary defaultValues)
        {

            IComponent[] comps = base.CreateComponentsCore(host, defaultValues);

            
            MessageBox.Show(((MyTabControl)comps[0]).TabPages.Count.ToString());
            ((MyTabControl)comps[0]).TabPages.RemoveAt(0);//去掉默认添加的TabPage
            ((MyTabControl)comps[0]).TabPages.RemoveAt(0);
            return comps;
        }
    }
当然，如果愿意的话，也可以自己在CreateComponentsCore中添加自定义的TabPage来使我们的TabControl更加的有实用价值！