Follow this tutorial to register NCover from the command line using the NCover.Registration command.

Steps

1. Open a new instance of the command line.
2. Type the following (providing your license key) and hit enter:

   NCover.Registration //license [KEYCODE]

3. Confirm output similar to what is shown here:
   

   Activating ... (0% complete) 
   
   Retrieving license from NCover server... (10% complete) 
   
   Verifying license key... (50% complete) 
   
   Activating license key... (75% complete) 
   
   Confirming license key activation... (90% complete) 
   
   Installing license... (95% complete) 
   
   Successfully activated NCover.

This technique can also be used in a batch script, MSBuild task, or a NAnt task to automate registration during your build process.