在Windows Forms C#应用程序中拥有配置文件的最简单方法

// 创建一个读取配置的类
public class ConfigProperties
{
   public string AppPath{ get; set; }
   public int ConnectionTimeout { get; set; }
}

// 读取配置文件的简单类方法
public static ConfigProperties ReadConfigFile(string filePath)
{
   if (!File.Exists(filePath))
   {
      throw new FileLoadException(string.Format("配置文件 '{0}' 不存在！", filePath));
   }

   string filePath = Path.GetFullPath(filePath);

   using(System.IO.StreamReader reader = new System.IO.StreamReader(filePath))
   {
      XmlDocument xmlDocument = new XmlDocument();
      xmlDocument.Load(reader);

      // 从XML节点中查找应用程序路径
      XPathNavigator navigator = xmlDocument.CreateNavigator();
      if (navigator != null)
      {
         XPathNodeIterator nodes = navigator.Select(@"//Setting");
         while (nodes.MoveNext())
         {
            XPathNodeNavigator settingNode = nodes.Current;
            
            if (settingNode["Property"] != null)
            {
               if (settingNode["Property"].InnerText == "AppPath")
               {
                  return new ConfigProperties 
                    { AppPath = settingNode.GetAttribute("Value").Value };
                }
            }
            

            // 从其他节点查找其他配置值
         }
      }
   }

   ConfigProperties configProperties = new ConfigProperties();

   // 如果找不到应用程序路径，则返回空配置对象
   return configProperties;
}

String filePath = Path.Combine(Environment.CurrentDirectoryPath, "myapp.config");
ConfigProperties configProperties = ReadConfigFile(filePath);
this.AppPath = configProperties.AppPath;

String filePath = Path.Combine(Environment.CurrentDirectoryPath, "myapp.config");
// 设置新配置值
configProperties.AppPath = @"C:\NewAppPath\";
// 保存更改后的配置
SaveConfigFile(filePath, configProperties);