c#读写ini配置文件示例

public class Config
{
    public Dictionary<string, string> configData;
    string fullFileName;
    public Config(string _fileName)
    {
        configData = new Dictionary<string,string>();
        fullFileName = Application.StartupPath + @"\" + _fileName;

        bool hasCfgFile =File.Exists(Application.StartupPath + @"\" + _fileName);
        if (hasCfgFile == false)
        {
            StreamWriter writer = new StreamWriter(File.Create(Application.StartupPath + @"\" + _fileName), Encoding.Default);
            writer.Close();
        }
        StreamReader reader = new StreamReader(Application.StartupPath + @"\" + _fileName, Encoding.Default);
        string line;

        int indx = 0;
        while ((line = reader.ReadLine()) != null)
        {
            if (line.StartsWith(";") || string.IsNullOrEmpty(line))
                configData.Add(";" + indx++, line);
            else
            {
                string[] key_value = line.Split('=');
                if (key_value.Length >= 2)
                    configData.Add(key_value[0], key_value[1]);
                else
                    configData.Add(";" + indx++, line);
            }
        }
        reader.Close();
    }

    public string get(string key)
    {
        if (configData.Count <= 0)
            return null;
        else if(configData.ContainsKey(key))
            return configData[key].ToString();
        else
            return null;
    }

    public void set(string key, string value)
    {
        if (configData.ContainsKey(key))
            configData[key] = value;
        else
            configData.Add(key, value);
    }

    public void save()
    {
        StreamWriter writer = new StreamWriter(fullFileName,false,Encoding.Default);
        IDictionaryEnumerator enu = configData.GetEnumerator();
        while (enu.MoveNext())
        {
            if (enu.Key.ToString().StartsWith(";"))
                writer.WriteLine(enu.Value);
            else
                writer.WriteLine(enu.Key + "=" + enu.Value);
        }
        writer.Close();
    }
}