protected static ConfigurationCenter getInstance()
 {
     if (instance == null)
     {
         lock (_locker)
         {
             if (instance == null)
             {
                 instance = new ConfigurationCenter();
             }
         }
     }
     return(instance);
 }
 public static bool load()
 {
     return(ConfigurationCenter.getInstance()._load());
 }
 public static string getValue(string key, string defaultValue = "")
 {
     return(ConfigurationCenter.getInstance()._getValue(key, defaultValue));
 }
 public static bool addConfigurationImpl(IConfiguration config)
 {
     return(ConfigurationCenter.getInstance()._addConfigurationImpl(config));
 }