public Dictionary <string, string> GetParsedEnvironmentVariables()
        {
            if (ParentItem == null)
            {
                return(environmentVariables);
            }

            StringTagModel tagSource         = ParentItem.GetStringTagModel(Selector);
            Dictionary <string, string> vars = new Dictionary <string, string> ();

            foreach (var v in environmentVariables)
            {
                vars [v.Key] = StringParserService.Parse(v.Value, tagSource);
            }
            return(vars);
        }