System.HealthLevel enumerated type Defines health levels.
orange : The service health is degraded. The service might have serious problems.
gray : No health data is available for this service.
green : Service is healthy.
red : The service is unavaiable, not functioning properly, or will stop functioning soon.
yellow : The service is healthy state, but experiencing some levels of problems.
Enumeration: orange, gray, green, red, yellow,