INI是一个用于INI文件操作的nuget打包类。它支持读/写，包括注释-写时保留注释。它似乎相当受欢迎，经过测试，易于使用。它也是完全免费和开源的。

免责声明:我是花生酱ini的作者。

这是我的班级，效果非常好:

public static class IniFileManager
{


    [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);
    [DllImport("kernel32.dll")]
    private static extern int GetPrivateProfileSection(string lpAppName,
             byte[] lpszReturnBuffer, int nSize, string lpFileName);


    /// <summary>
    /// Write Data to the INI File
    /// </summary>
    /// <PARAM name="Section"></PARAM>
    /// Section name
    /// <PARAM name="Key"></PARAM>
    /// Key Name
    /// <PARAM name="Value"></PARAM>
    /// Value Name
    public static void IniWriteValue(string sPath,string Section, string Key, string Value)
    {
        WritePrivateProfileString(Section, Key, Value, sPath);
    }

    /// <summary>
    /// Read Data Value From the Ini File
    /// </summary>
    /// <PARAM name="Section"></PARAM>
    /// <PARAM name="Key"></PARAM>
    /// <PARAM name="Path"></PARAM>
    /// <returns></returns>
    public static string IniReadValue(string sPath,string Section, string Key)
    {
        StringBuilder temp = new StringBuilder(255);
        int i = GetPrivateProfileString(Section, Key, "", temp,
                                        255, sPath);
        return temp.ToString();

    }

}

使用是显而易见的，因为它是一个静态类，只需调用IniFileManager。IniWriteValue用于读取section或IniFileManager。IniReadValue用于读取section。

joerage回答中的代码是鼓舞人心的。

不幸的是，它改变了键的字符大小写，并且不处理注释。所以我写了一些足够健壮的东西，可以读取(只)非常脏的INI文件，并允许按原样检索密钥。

它使用一些LINQ，一个嵌套的不区分大小写的字符串字典来存储节，键和值，并一次性读取文件。

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

class IniReader
{
    Dictionary<string, Dictionary<string, string>> ini = new Dictionary<string, Dictionary<string, string>>(StringComparer.InvariantCultureIgnoreCase);

    public IniReader(string file)
    {
        var txt = File.ReadAllText(file);

        Dictionary<string, string> currentSection = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase);

        ini[""] = currentSection;

        foreach(var line in txt.Split(new[]{"\n"}, StringSplitOptions.RemoveEmptyEntries)
                               .Where(t => !string.IsNullOrWhiteSpace(t))
                               .Select(t => t.Trim()))
        {
            if (line.StartsWith(";"))
                continue;

            if (line.StartsWith("[") && line.EndsWith("]"))
            {
                currentSection = new Dictionary<string, string>(StringComparer.InvariantCultureIgnoreCase);
                ini[line.Substring(1, line.LastIndexOf("]") - 1)] = currentSection;
                continue;
            }

            var idx = line.IndexOf("=");
            if (idx == -1)
                currentSection[line] = "";
            else
                currentSection[line.Substring(0, idx)] = line.Substring(idx + 1);
        }
    }

    public string GetValue(string key)
    {
        return GetValue(key, "", "");
    }

    public string GetValue(string key, string section)
    {
        return GetValue(key, section, "");
    }

    public string GetValue(string key, string section, string @default)
    {
        if (!ini.ContainsKey(section))
            return @default;

        if (!ini[section].ContainsKey(key))
            return @default;

        return ini[section][key];
    }

    public string[] GetKeys(string section)
    {
        if (!ini.ContainsKey(section))
            return new string[0];

        return ini[section].Keys.ToArray();
    }

    public string[] GetSections()
    {
        return ini.Keys.Where(t => t != "").ToArray();
    }
}

如果你只是想要一个简单的阅读器没有部分和任何其他dll这里是一个简单的解决方案:

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Tool
{
    public class Config
    {
        Dictionary <string, string> values;
        public Config (string path)
        {
            values = File.ReadLines(path)
            .Where(line => (!String.IsNullOrWhiteSpace(line) && !line.StartsWith("#")))
            .Select(line => line.Split(new char[] { '=' }, 2, 0))
            .ToDictionary(parts => parts[0].Trim(), parts => parts.Length>1?parts[1].Trim():null);
        }
        public string Value (string name, string value=null)
        {
            if (values!=null && values.ContainsKey(name))
            {
                return values[name];
            }
            return value;
        }
    }
}

使用示例:

    file = new Tool.Config (Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location) + "\\config.ini");
    command = file.Value ("command");
    action = file.Value ("action");
    string value;
    //second parameter is default value if no key found with this name
    value = file.Value("debug","true");
    this.debug = (value.ToLower()=="true" || value== "1");
    value = file.Value("plain", "false");
    this.plain = (value.ToLower() == "true" || value == "1");

配置文件内容同时(如你所见，支持#符号的行注释):

#command to run
command = php

#default script
action = index.php

#debug mode
#debug = true

#plain text mode
#plain = false

#icon = favico.ico

我发现了这个简单的实现:

http://bytes.com/topic/net/insights/797169-reading-parsing-ini-file-c

能满足我的需要。

下面是如何使用它:

public class TestParser
{
    public static void Main()
    {
        IniParser parser = new IniParser(@"C:\test.ini");

        String newMessage;

        newMessage = parser.GetSetting("appsettings", "msgpart1");
        newMessage += parser.GetSetting("appsettings", "msgpart2");
        newMessage += parser.GetSetting("punctuation", "ex");

        //Returns "Hello World!"
        Console.WriteLine(newMessage);
        Console.ReadLine();
    }
}

代码如下:

using System;
using System.IO;
using System.Collections;

public class IniParser
{
    private Hashtable keyPairs = new Hashtable();
    private String iniFilePath;

    private struct SectionPair
    {
        public String Section;
        public String Key;
    }

    /// <summary>
    /// Opens the INI file at the given path and enumerates the values in the IniParser.
    /// </summary>
    /// <param name="iniPath">Full path to INI file.</param>
    public IniParser(String iniPath)
    {
        TextReader iniFile = null;
        String strLine = null;
        String currentRoot = null;
        String[] keyPair = null;

        iniFilePath = iniPath;

        if (File.Exists(iniPath))
        {
            try
            {
                iniFile = new StreamReader(iniPath);

                strLine = iniFile.ReadLine();

                while (strLine != null)
                {
                    strLine = strLine.Trim().ToUpper();

                    if (strLine != "")
                    {
                        if (strLine.StartsWith("[") && strLine.EndsWith("]"))
                        {
                            currentRoot = strLine.Substring(1, strLine.Length - 2);
                        }
                        else
                        {
                            keyPair = strLine.Split(new char[] { '=' }, 2);

                            SectionPair sectionPair;
                            String value = null;

                            if (currentRoot == null)
                                currentRoot = "ROOT";

                            sectionPair.Section = currentRoot;
                            sectionPair.Key = keyPair[0];

                            if (keyPair.Length > 1)
                                value = keyPair[1];

                            keyPairs.Add(sectionPair, value);
                        }
                    }

                    strLine = iniFile.ReadLine();
                }

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (iniFile != null)
                    iniFile.Close();
            }
        }
        else
            throw new FileNotFoundException("Unable to locate " + iniPath);

    }

    /// <summary>
    /// Returns the value for the given section, key pair.
    /// </summary>
    /// <param name="sectionName">Section name.</param>
    /// <param name="settingName">Key name.</param>
    public String GetSetting(String sectionName, String settingName)
    {
        SectionPair sectionPair;
        sectionPair.Section = sectionName.ToUpper();
        sectionPair.Key = settingName.ToUpper();

        return (String)keyPairs[sectionPair];
    }

    /// <summary>
    /// Enumerates all lines for given section.
    /// </summary>
    /// <param name="sectionName">Section to enum.</param>
    public String[] EnumSection(String sectionName)
    {
        ArrayList tmpArray = new ArrayList();

        foreach (SectionPair pair in keyPairs.Keys)
        {
            if (pair.Section == sectionName.ToUpper())
                tmpArray.Add(pair.Key);
        }

        return (String[])tmpArray.ToArray(typeof(String));
    }

    /// <summary>
    /// Adds or replaces a setting to the table to be saved.
    /// </summary>
    /// <param name="sectionName">Section to add under.</param>
    /// <param name="settingName">Key name to add.</param>
    /// <param name="settingValue">Value of key.</param>
    public void AddSetting(String sectionName, String settingName, String settingValue)
    {
        SectionPair sectionPair;
        sectionPair.Section = sectionName.ToUpper();
        sectionPair.Key = settingName.ToUpper();

        if (keyPairs.ContainsKey(sectionPair))
            keyPairs.Remove(sectionPair);

        keyPairs.Add(sectionPair, settingValue);
    }

    /// <summary>
    /// Adds or replaces a setting to the table to be saved with a null value.
    /// </summary>
    /// <param name="sectionName">Section to add under.</param>
    /// <param name="settingName">Key name to add.</param>
    public void AddSetting(String sectionName, String settingName)
    {
        AddSetting(sectionName, settingName, null);
    }

    /// <summary>
    /// Remove a setting.
    /// </summary>
    /// <param name="sectionName">Section to add under.</param>
    /// <param name="settingName">Key name to add.</param>
    public void DeleteSetting(String sectionName, String settingName)
    {
        SectionPair sectionPair;
        sectionPair.Section = sectionName.ToUpper();
        sectionPair.Key = settingName.ToUpper();

        if (keyPairs.ContainsKey(sectionPair))
            keyPairs.Remove(sectionPair);
    }

    /// <summary>
    /// Save settings to new file.
    /// </summary>
    /// <param name="newFilePath">New file path.</param>
    public void SaveSettings(String newFilePath)
    {
        ArrayList sections = new ArrayList();
        String tmpValue = "";
        String strToSave = "";

        foreach (SectionPair sectionPair in keyPairs.Keys)
        {
            if (!sections.Contains(sectionPair.Section))
                sections.Add(sectionPair.Section);
        }

        foreach (String section in sections)
        {
            strToSave += ("[" + section + "]\r\n");

            foreach (SectionPair sectionPair in keyPairs.Keys)
            {
                if (sectionPair.Section == section)
                {
                    tmpValue = (String)keyPairs[sectionPair];

                    if (tmpValue != null)
                        tmpValue = "=" + tmpValue;

                    strToSave += (sectionPair.Key + tmpValue + "\r\n");
                }
            }

            strToSave += "\r\n";
        }

        try
        {
            TextWriter tw = new StreamWriter(newFilePath);
            tw.Write(strToSave);
            tw.Close();
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }

    /// <summary>
    /// Save settings back to ini file.
    /// </summary>
    public void SaveSettings()
    {
        SaveSettings(iniFilePath);
    }
}

通常，当您使用c#和. net框架创建应用程序时，您不会使用INI文件。更常见的方法是将设置存储在基于xml的配置文件或注册表中。 但是，如果您的软件与遗留应用程序共享设置，则可能更容易使用其配置文件，而不是将信息复制到其他地方。

. net框架不支持直接使用INI文件。但是，您可以使用带有平台调用服务(P/Invoke)的Windows API函数来写入和读取文件。在本链接中，我们创建了一个表示INI文件的类，并使用Windows API函数来操作它们。 请点击下面的链接。

读取和写入INI文件