Redirect after Session Expired (Timeout) using C# in ASP.Net

I forgot to add the web.config code I used to timeout my session

How do I make it to redirect to login when no activity goes on for 1 minute?

<?xml version="1.0"?>

<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=169433
  -->

<configuration>
    <system.web>
      <sessionState mode="InProc" timeout="1"></sessionState>
      <compilation debug="true" targetFramework="4.5.2" />
      <httpRuntime targetFramework="4.5.2" />
    </system.web>
</configuration>