[C#]this method is obsolete it has been replaced by system.configuration

之前遇過一個警告

「'System.Configuration.ConfigurationSettings.AppSettings' is obsolete: '"This method is obsolete, it has been replaced by System.Configuration!System.Configuration.ConfigurationManager.AppSettings"'」

其實放著不理也不會有什麼問題，但是看著就很煩，所以還是把過時的方法改掉比較好。

解決方法:

將

ConfigurationSettings.AppSettings["KeyName"]

改為

ConfigurationManager.AppSettings["KeyName"]

參考:

'System.Configuration.ConfigurationSettings.AppSettings' is obsolete