c#字定义异常处理类

public class DataLoaderException:Exception
    {
        private LogLevel _vLevel = LogLevel.None;
        private string _vsMessage = string.Empty;
 
        public LogLevel Level
        {
            get { return _vLevel; }
        }
        public string Message 
        {
            get { return _vsMessage; }
        }
 
        public DataLoaderException(LogLevel level,string message):base(message)
        {
            _vLevel = level;
            _vsMessage = message;
        }
    }

 使用方法：
if (instanceTypes[3] == "")
throw new DataLoaderException(LogLevel.Error, "Manufacturer in config.xml cann't be empty.");