Warning "system. configuration. configurationsettings. getconfig (string)" is out of date.

in VS 2005, The configurationsettings class is often used to read the Program Configuration File Information of the application, to obtain the database connection string. However, the following error often occurs:
warning "system. configuration. configurationsettings. getconfig (string) "expired:" This method is obsolete, it has been replaced by system. configuration! System. configuration. configurationmanager. getsection "
warning 1" system. configuration. configurationsettings. receivettings "is out of date:" This method is obsolete, it has been replaced by system. Configuration! System. configuration. configurationmanager. receivettings "

solution:
first . configuration. DLL file reference, both add reference in this project, find System in browsing. configuration. DLL file, which is usually stored in C:/Windows/Microsoft.. Net/framework/v2.0.50727 folder;
next . "system. configuration. configurationsettings. replace the appsettings index. net 2. "System. configuration. configurationmanager. deleettings" indexer under 0. Replace "system. configuration. configurationsettings. getconfig with system. configuration. configurationmanager. getsection