[ServiceContract]
    public interface IService1
    {
        [OperationContract]
        UploadFileInfo UploadFile(RemoteFileInfo data);
    }


    [MessageContract]
    public class RemoteFileInfo
    {
        [MessageHeader]
        public string FileName;

        [MessageHeader(MustUnderstand = true)]
        public int Status;

        [MessageBodyMember(Order = 1)]
        public System.IO.Stream FileByteStream;
    }

[MessageContract]
    public class UploadFileInfo
    {
        [MessageHeader(MustUnderstand = true)]
        public string FileName1;
    }

public class Service1 : IService1
    {
        public UploadFileInfo UploadFile(RemoteFileInfo data)
        {
            UploadFileInfo Result = new UploadFileInfo();

            string str=System.Guid.NewGuid().ToString() +"_"+ data.FileName;
            if (data.Status== 1)
            {
                Result.FileName1 = "";
                return Result;
            }

            using (Stream fs = File.Create(@"C:\test\" + str))
            {
                const int bufferLen = 65000;
                byte[] buffer = new byte[bufferLen];
                int count = 0;
                while ((count = data.FileByteStream.Read(buffer, 0, bufferLen)) > 0)
                {
                    fs.Write(buffer, 0, count);
                }
                fs.Close();
                data.FileByteStream.Close();

                Result.FileName1 = str;
            }

            return Result;
        }
    }