Using Drush Site-Install in C#

Question

I\'m trying to do a Drupal site install using Drush in C# as part of a full Windows Server site installation using MSI. The Drush commmand I am using is the following one.

Answer 1

The cause of this issue was the Environment Variables. The Drush MSI installer sets up User Path Environment Variables which are not recognized in an MSI machine context.
So, by adding System Path Variables for Drush, GnuWin32 and PHP to the site-install MSI the site can be programmatically installed.