Using Web.config hash for variables using add, key, and value

Use configuration (web.config) hash to set variables. First, there is the web.config file section: ...

<configuration>
   <appSettings>
      <add key="fooLink" value="http://www.foo.htm"/> 
   </appSettings>
</configuration>

Now in the code-behind I can set a Hyperlink variable as follows:

HyperLinkFoo.NavigateUrl = ConfigurationManager.AppSettings["fooLink"].ToString().ToLower();