uml类图高分求助

Question

<interface>
IUploadData
+RawToClear(in rawData:byte):IUploadData
ReplayCallbackSetInfo
                                          0---IUploadData
+RawToClear(in rawData:byte):IUploadData由于学校没教过UMl类图。所以看着很费劲。也不知道自己这么写对不对。。请人指点。谢谢啦。。最好能解释下
    interface IUploadData
    {
        IUploadData RawToClear(byte rawData);
    }
    class ReplayCallbackSetInfo : IUploadData
    {
        public IUploadData RawToClear(byte rawData)
        {        }
    }