法1：调用外部C++api库

具体使用：

public class Ini{//读取INI文件需要调用C++的APP[System.Runtime.InteropServices.DllImport("kernel32")]private static extern long WritePrivateProfileString(string section, string key, string val, string filePath);[System.Runtime.InteropServices.DllImport("kernel32")]private static extern int GetPrivateProfileString(string section, string key, string def, System.Text.StringBuilder retVal, int size, string filePath);private string iPath = null;public Ini(string path){this.iPath = path;}/// <summary>/// 写数据/// </summary>/// <param name="section">配置节</param>/// <param name="key">键名</param>/// <param name="value">键值</param>public void WriteValue(string section, string key, string value){  WritePrivateProfileString(section, key, value, iPath);}/// <summary>/// 读数据/// </summary>/// <param name="section">配置节</param>/// <param name="key">键名</param>/// <returns></returns>public string ReadValue(string section, string key){// 每次从ini中读取多少字节 System.Text.StringBuilder temp = new System.Text.StringBuilder(255);        GetPrivateProfileString(section, key, "", temp, 255, iPath);return temp.ToString();}
}public class Program
{public static void Main(){string filePath = Application.streamingAssetsPath + "/file.ini";string section = "SectionName";string key = "KeyName";// 读取 INI 文件string value = Ini.ReadValue(section, key, "", filePath);Console.WriteLine("Value: " + value);// 写入 INI 文件Ini.WriteValue(section, key, "NewValue", filePath);Console.WriteLine("Value written.");// 重新读取 INI 文件value = Ini.ReadValue(section, key, "", filePath);Console.WriteLine("Value: " + value);}
}

ini文本参考：

法2：使用System.IO命名空间的类：

具体使用：

using System;
using System.Collections.Generic;
using System.IO;class IniFile
{private readonly string filePath;private readonly Dictionary<string, Dictionary<string, string>> sections;public IniFile(string filePath){this.filePath = filePath;this.sections = new Dictionary<string, Dictionary<string, string>>();Load();}public string GetValue(string section, string key){if (sections.ContainsKey(section) && sections[section].ContainsKey(key)){return sections[section][key];}return null;}public void SetValue(string section, string key, string value){if (!sections.ContainsKey(section)){sections[section] = new Dictionary<string, string>();}sections[section][key] = value;Save();}private void Load(){string currentSection = null;foreach (string line in File.ReadLines(filePath)){string trimmedLine = line.Trim();if (trimmedLine.StartsWith("[") && trimmedLine.EndsWith("]")){currentSection = trimmedLine.Substring(1, trimmedLine.Length - 2);continue;}int equalsIndex = trimmedLine.IndexOf('=');if (equalsIndex > 0){string key = trimmedLine.Substring(0, equalsIndex).Trim();string value = trimmedLine.Substring(equalsIndex + 1).Trim();if (!string.IsNullOrEmpty(currentSection) && !string.IsNullOrEmpty(key)){if (!sections.ContainsKey(currentSection)){sections[currentSection] = new Dictionary<string, string>();}sections[currentSection][key] = value;}}}}private void Save(){using (StreamWriter writer = new StreamWriter(filePath)){foreach (KeyValuePair<string, Dictionary<string, string>> section in sections){writer.WriteLine($"[{section.Key}]");foreach (KeyValuePair<string, string> entry in section.Value){writer.WriteLine($"{entry.Key}={entry.Value}");}writer.WriteLine();}}}
}public class Program
{public static void Main(){string filePath = Application.streamingAssetsPath + "/file.ini";string section = "SectionName";string key = "KeyName";IniFile iniFile = new IniFile(filePath);// 读取值string value = iniFile.GetValue("section", "key");Console.WriteLine(value);// 设置值iniFile.SetValue("Section2", "Key2", "Value2");       }
}