Fixing: Error 1001. The specified service already exists

Fixing: Error 1001. The specified service already exists

Description: This error occurred during a per user install. The install was using the installer classes for services. The application was installed for all users. When a second user ran the installer classes tried to install the service again. This is fixed by testing for the existence of the service and skipping the service install if it already exists.

Code: Test For Service Existence

Code To Test For Service Existence


bool serviceExists = false;
foreach ( System.ServiceProcess.ServiceController serviceController in System.ServiceProcess.ServiceController.GetServices())
{
if (serviceController.ServiceName == "TwentyTwentyLiveService")
{
serviceExists = true;
}
}