Visual Studio 设计器视图无法获得正确的形式

我在 C# 中有 GUI 项目。 主窗口类的定义如下所示：

表单视图.cs文件

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace RssReader
{
    partial class FormView : Form, IView
    {
        private SplitContainer MainContainer;
        private TreeView Items;
        private MenuStrip MainMenu;
        private ToolStripMenuItem File;
        private ToolStripMenuItem AddFeed;
        private ToolStripSeparator Separator;
        private ToolStripMenuItem Quit;
        private WebBrowser Message;
        /* some methods here which are implementing some kind of logic */
    } 
}

表单视图初始化.cs文件

namespace RssReader
{
    partial class FormView
    {
        private void InitializeComponent()
        {
            this.MainContainer = new System.Windows.Forms.SplitContainer();
            this.Items = new System.Windows.Forms.TreeView();
            this.Message = new System.Windows.Forms.WebBrowser();
            this.MainMenu = new System.Windows.Forms.MenuStrip();
            this.File = new System.Windows.Forms.ToolStripMenuItem();
            this.AddFeed = new System.Windows.Forms.ToolStripMenuItem();
            this.Separator = new System.Windows.Forms.ToolStripSeparator();
            this.Quit = new System.Windows.Forms.ToolStripMenuItem();
            // the only component in this file is InitializeComponent method
            // all, what it does is just defining items on the form
            // and initializing it, i.e., creating instances, assign names etc.
        }
    }
}

FormViewEventHandlers.cs file

using System;
using System.IO;
using System.Windows.Forms;
namespace RssReader
{
    partial class FormView
    {
        private void Quit_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("Do you really want to quit?", "Exit", MessageBoxButtons.YesNo)
                == DialogResult.Yes)
                Application.Exit();
        }
        // here goes event handler functions
    }
}

问题是：当我尝试在Visual Studio 2010的设计视图中查看FormView.cs时，为什么我得到一个大小错误且没有元素的表单？

public partial class FormView
{
    private System.ComponentModel.IContainer components = null;
    private SplitContainer MainContainer;
    private TreeView Items;
    private MenuStrip MainMenu;
    private ToolStripMenuItem File;
    private ToolStripMenuItem AddFeed;
    private ToolStripSeparator Separator;
    private ToolStripMenuItem Quit;
    private ContextMenuStrip ContextMenu;
    private ToolStripMenuItem RemoveItem;
    private WebBrowser Message;
    protected void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.MainContainer = new System.Windows.Forms.SplitContainer();
        this.Items = new System.Windows.Forms.TreeView();
        this.Message = new System.Windows.Forms.WebBrowser();
        this.MainMenu = new System.Windows.Forms.MenuStrip();
        this.File = new System.Windows.Forms.ToolStripMenuItem();
        this.AddFeed = new System.Windows.Forms.ToolStripMenuItem();
        this.Separator = new System.Windows.Forms.ToolStripSeparator();
        this.Quit = new System.Windows.Forms.ToolStripMenuItem();
        this.ContextMenu = new System.Windows.Forms.ContextMenuStrip(this.components);
        this.RemoveItem = new System.Windows.Forms.ToolStripMenuItem();
        this.MainContainer.Panel1.SuspendLayout();
        this.MainContainer.Panel2.SuspendLayout();
        this.MainContainer.SuspendLayout();
        this.MainMenu.SuspendLayout();
        this.ContextMenu.SuspendLayout();
        this.SuspendLayout();
        /*  there goes properties initializing, like setting names, sizes etc  */
    }
    // Added just in case
    protected override void Dispose(bool disposing)
    {
        if (disposing && (components != null))
        {
            components.Dispose();
        }
        base.Dispose(disposing);
    }
}