https://blog.csdn.net/Reforn/article/details/104647551/
//從鍵值對中查找指定的鍵
var vara = iniCfg.Key_value.Where(cfgkey => cfgkey.Keys.Contains(strKey));
Dictionary<string, string> dicFind = vara.ToList().FirstOrDefault();
if (dicFind.Count.Equals(1))
{
dicFind[strKey] = strValue;
}
//iniCfg.Key_value 類型為List<Dictionary<string, string>>