WCF数据通信参数不能是Image类型？

小渣渣

{"There was an error while trying to serialize parameter http://tempuri.org/:_image. The InnerException message was 'Type 'System.Drawing.Bitmap' with data contract name 'Bitmap:http://schemas.datacontract.org/2004/07/System.Drawing' is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer.'.  Please see InnerException for more details."}

{“有一个错误，而试图序列化参数HTTP：/ /：_image tempuri。org。InnerException消息类型系统。图。位图的数据合同名称“位图：http://schemas.datacontract.org/2004/07/system.drawing”预计不会。考虑使用datacontractresolver或添加任何类型不知道静态已知类型，例如链表，用knowntypeattribute属性或添加到已知类型通过DataContractSerializer名单。”。请详见InnerException。”}

我反正报错了，不知道为啥，还没解决。。