c# - is it possible to Use key values within app.config in vs 2013 -

i trying access key value key in app.config not work.

<appsettings>  <add key="key1" value="dev.cloud" />  <add key="url" value="https://www.[key1].com"/>  </appsettings> 

i tried ${key1} valumanifest.xml not work in app.config. missing here ?

you have use configurationmanager read settings in appsettings section. example:

var key1val = configurationmanager.appsettings["key1"] // returns value of key1 appsettings.