帮我用c#写一个ini文件遍历的示例

好的，下面是一个简单的示例：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Runtime.InteropServices;

class IniFile
{
    private string filePath;

    [DllImport("kernel32")]
    private static extern long WritePrivateProfileString(string section,
        string key, string val, string filePath);

    [DllImport("kernel32")]
    private static extern int GetPrivateProfileString(string section,
             string key, string def, StringBuilder retVal, int size, string filePath);

    public IniFile(string filePath)
    {
        this.filePath = filePath;
    }

    public void Write(string section, string key, string value)
    {
        WritePrivateProfileString(section, key, value, this.filePath);
    }

    public string Read(string section, string key)
    {
        StringBuilder sb = new StringBuilder(255);
        GetPrivateProfileString(section, key, "", sb, 255, this.filePath);
        return sb.ToString();
    }

    public List<string> GetSections()
    {
        List<string> sections = new List<string>();
        byte[] buffer = new byte[2048];
        int len = GetPrivateProfileString(null, null, null, buffer, 2048, this.filePath);
        int j = 0;
        for (int i = 0; i < len; i++)
        {
            if (buffer[i] == 0)
            {
                sections.Add(Encoding.Default.GetString(buffer, j, i - j));
                j = i + 1;
            }
        }
        return sections;
    }

    public Dictionary<string, string> GetKeys(string section)
    {
        Dictionary<string, string> keys = new Dictionary<string, string>();
        StringBuilder sb = new StringBuilder(255);
        int len = GetPrivateProfileString(section, null, null, sb, 255, this.filePath);
        int j = 0;
        for (int i = 0; i < len; i++)
        {
            if (sb[i] == 0)
            {
                string key = sb.ToString(j, i - j);
                string value = Read(section, key);
                keys.Add(key, value);
                j = i + 1;
            }
        }
        return keys;
    }

    public void RemoveKey(string section, string key)
    {
        Write(section, key, null);
    }

    public void RemoveSection(string section)
    {
        Write(section, null, null);
    }
}

class Program
{
    static void Main(string[] args)
    {
        IniFile ini = new IniFile("example.ini");

        // 写入数据
        ini.Write("Section1", "Key1", "Value1");
        ini.Write("Section1", "Key2", "Value2");
        ini.Write("Section2", "Key3", "Value3");
        ini.Write("Section2", "Key4", "Value4");

        // 读取数据
        Console.WriteLine(ini.Read("Section1", "Key1"));

        // 获取所有Section
        List<string> sections = ini.GetSections();
        foreach (string section in sections)
        {
            Console.WriteLine(section);
        }

        // 获取Section中的所有Key
        Dictionary<string, string> keys = ini.GetKeys("Section1");
        foreach (KeyValuePair<string, string> key in keys)
        {
            Console.WriteLine(key.Key + " = " + key.Value);
        }

        // 删除Key和Section
        ini.RemoveKey("Section1", "Key1");
        ini.RemoveSection("Section2");
    }
}

这个示例演示了如何使用`IniFile`类来读取和写入INI文件，并遍历其中的数据。`IniFile`类包括了`Write`、`Read`、`GetSections`、`GetKeys`、`RemoveKey`和`RemoveSection`方法，可以方便地实现INI文件的增删改查操作。