补充一个技术文章吧，否则真的对不起博客园

        /**//// <summary> 较安全的返回指定属性的值 </summary>
        /// <remarks>
        /// 例如，如果你想获得Company的CompanyCode的DefaultCode属性，可以使用
        /// <code>
        /// object code = _company.SafeGetValue("CompanyCode.DefaultCode");
        /// </code>
        /// 但注意：
        ///        传入的参数(属性名)不允许书写错误，在此方法中不对此进行检查；
        /// </remarks>
        public object SafeGetValue(string propertyName)
        {
            string[] props = propertyName.Split('.');
            string propName;
            PropertyInfo propInfo;
            object obj = this;
            Type objType;

            for (int i = 0; i < props.Length; i++)
            {
                objType = obj.GetType();

                propName = props[i];
                if (propName.Trim().Length == 0)
                    throw new ArgumentException("propertyName");

                try
                {
                    propInfo = objType.GetProperty(propName);
                    if (propInfo == null)
                        throw new ArgumentException("propertyName");

                    obj = propInfo.GetValue(obj, null);
                }
                catch (AmbiguousMatchException)
                {
                    PropertyDescriptorCollection propDescs = TypeDescriptor.GetProperties(objType);
                    PropertyDescriptor propDesc = propDescs.Find(propName, false);
                    if (propDesc == null)
                        throw new ArgumentException("propertyName");
                    else
                    {
                        obj = propDesc.GetValue(obj);
                    }
                }

                if (obj == null)
                    return null;
            }
            return obj;
        }