here i have solved my self
[WebInvoke(Method = "POST", ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest, UriTemplate = "UploadImage")]
public string RecieveImage(Stream ImageStream)
FileStream fileToupload = new FileStream(@"C:\desktop\wcfUploadImage.jpeg", FileMode.OpenOrCreate);
byte[] bytearray = new byte[5242880];
int bytesRead, totalBytesRead = 0;
do
{
bytesRead = ImageStream.Read(bytearray, 0, bytearray.Length);
totalBytesRead += bytesRead;
} while (bytesRead > 0);
fileToupload.Write(bytearray, 0, totalBytesRead);
fileToupload.Close();
fileToupload.Dispose();
}