问：C++/CLI怎么访问文件

问：C++/CLI如何访问文件？
哪位朋友给说说在VC2008中，用C++/CLI如何实现二进制文件的访问（单字节读/写、块的读/写、打开/关闭、文件指针移动等）？
前提是不使用标准C/C++的库函数，不使用MFC，只用CLI自带的库函数。
这里先谢谢了

------解决方案--------------------------------------------------------
#pragma once


namespace Example {

using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

using namespace System::IO;
using namespace System::IO::IsolatedStorage;


/// <summary>
/// Form1 摘要
///
/// 警告: 如果更改此类的名称，则需要更改
/// 与此类所依赖的所有 .resx 文件关联的托管资源编译器工具的
/// “资源文件名”属性。否则，
/// 设计器将不能与此窗体的关联
/// 本地化资源正确交互。
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
Form1(void)
{
InitializeComponent();
//
//TODO: 在此处添加构造函数代码
//
}

protected:
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
~Form1()
{
if (components)
{
delete components;
}
}
private: System::Windows::Forms::OpenFileDialog^ openFileDialog1;
protected: 
private: System::Windows::Forms::Button^ button1;
private: System::Windows::Forms::Button^ button2;
private: System::Windows::Forms::Button^ button3;
private: System::Windows::Forms::RichTextBox^ richTextBox1;

private:
/// <summary>
/// 必需的设计器变量。
/// </summary>
System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
/// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
void InitializeComponent(void)
{
this->openFileDialog1 = (gcnew System::Windows::Forms::OpenFileDialog());
this->button1 = (gcnew System::Windows::Forms::Button());
this->button2 = (gcnew System::Windows::Forms::Button());
this->button3 = (gcnew System::Windows::Forms::Button());
this->richTextBox1 = (gcnew System::Windows::Forms::RichTextBox());
this->SuspendLayout();
// 
// openFileDialog1
// 
this->openFileDialog1->FileName = L"openFileDialog1";
// 
// button1
// 
this->button1->Location = System::Drawing::Point(1, 1);
this->button1->Name = L"button1";
this->button1->Size = System::Drawing::Size(118, 23);
this->button1->TabIndex = 0;
this->button1->Text = L"浏览文本文件";
this->button1->UseVisualStyleBackColor = true;
this->button1->Click += gcnew System::EventHandler(this, &Form1::button1_Click);
// 
// button2
// 
this->button2->Location = System::Drawing::Point(124, 1);
this->button2->Name = L"button2";
this->button2->Size = System::Drawing::Size(130, 23);
this->button2->TabIndex = 1;
this->button2->Text = L"保存独立存储文件";
this->button2->UseVisualStyleBackColor = true;
this->button2->Click += gcnew System::EventHandler(this, &Form1::button2_Click);
// 
// button3
// 
this->button3->Location = System::Drawing::Point(259, 1);
this->button3->Name = L"button3";
this->button3->Size = System::Drawing::Size(130, 23);
this->button3->TabIndex = 2;
this->button3->Text = L"读取独立存储文件";
this->button3->UseVisualStyleBackColor = true;
this->button3->Click += gcnew System::EventHandler(this, &Form1::button3_Click);