ApprovalUtilities.Utilities.OsUtils.IsUnixOs C# (CSharp) Method

        public static bool IsUnixOs()
        {
            return !IsWindowsOs();
        }
    }

 private static IEnumerable <string> FindProgramOnPath(string programName)
 {
     if (EnvironmentPaths == null)
     {
         EnvironmentPaths = Environment.GetEnvironmentVariable("PATH").Split(Path.PathSeparator).ToList();
         if (OsUtils.IsUnixOs())
         {
             // not sure why this path is not included in the environment variables
             // but couldn't find find p4merge without it.
             EnvironmentPaths.Add("/usr/local/bin");
         }
     }
     return(EnvironmentPaths.Select(path => Path.Combine(path, programName)).Where(File.Exists));
 }