byte[] content = await result.Content.ReadAsByteArrayAsync();
ByteArrayContent byteArrayContent = new ByteArrayContent(content);
String S = Encoding.UTF8.GetString(content, 0, content.Length);
var headerPlusData = S.Split(new string[] { "name=clipdata" },StringSplitOptions.None);
byte[] dataBytes = Encoding.UTF8.GetBytes(headerPlusData[1]);
MemoryStream stream = new MemoryStream(content);