https://blog.csdn.net/Reforn/article/details/104647551/
//从键值对中查找指定的键
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 类型为List<Dictionary<string, string>>
C#从List Dictionary string, string 中查找指定的key，并修改对应的值
原文：https://www.cnblogs.com/sunny3158/p/14608377.html