Adding Connection String and keys in web.config

In order to add a connectionstring to web.config:

< connectionStrings >

< add name="myconn" connectionString="Data Source=*****;Initial Catalog=Excentive;User ID=*****;Password=*****;MultipleActiveResultSets=True" providerName="System.Data.SqlClient" / >

< / connectionStrings >

In order to get connection string in a cs file:

System.Configuration.ConfigurationManager.ConnectionStrings["myconn"].ConnectionString)

If you want to add key to web.config:

< appSettings >

< add key="ServerURL" value="my_url" / >

< / appSettings >

When you want to call it in your cs file:

ConfigurationManager.AppSettings["ServerURL"]