in Platform/Tools/PowerShell/JetCmdlet/Infra/TeamCity/TeamCityProperties.cs [67:74]
public string TryGetSystemProperty([NotNull] string name)
{
if(name == null)
throw new ArgumentNullException("name");
name = Regex.Replace(name, @"^system\.", "", RegexOptions.IgnoreCase); // Props are listed without the "system." prefix in the file
TryLoadSystemPropertiesFile();
return mySystemProperties != null ? mySystemProperties.TryGetValue(name) : null;
}