public OptionsManager(string path, Parser.Parser parser, IValidator validator)
        {
            defaultOptions = new T();
            string options;

            try
            {
                using (StreamReader sr = new StreamReader($"{path}appsettings.json"))
                {
                    options = sr.ReadToEnd();
                }

                jsonOptions = parser.DeserializeJson <T>(options);
                validator.Validate(jsonOptions);
                isJsonConfigured = true;
                LogString       += "appsettings.json is loaded.\n";
            }
            catch (Exception ex)
            {
                isJsonConfigured = false;
                LogString       += ex.Message;
            }

            try
            {
                using (StreamReader sr = new StreamReader($"{path}config.xml"))
                {
                    options = sr.ReadToEnd();
                }

                xmlOptions = parser.DeserializeXML <T>(options);
                validator.Validate(xmlOptions);
                isXmlConfigured = true;
                LogString      += "config.xml is loaded.\n";
            }
            catch (Exception ex)
            {
                isXmlConfigured = false;
                LogString      += ex.Message;
            }

            if (!isJsonConfigured && !isXmlConfigured)
            {
                LogString += "default configuration.\n";
            }
        }