private void ExecuteQueryToServer(ChunkStringBuilder sb)
 {
     this.m_context.FireExecutingWebRequestEvent(new WebRequestEventArgs(this.RequestExecutor));
     this.RequestExecutor.RequestContentType = "text/xml";
     if (this.m_context.AuthenticationMode == ClientAuthenticationMode.Default)
     {
         this.RequestExecutor.RequestHeaders["X-RequestForceAuthentication"] = "true";
     }
     ClientRequest.ExecuteQueryMimeInfo executeQueryMimeInfo = null;
     if (this.SerializationContext.Streams != null && this.SerializationContext.Streams.Count > 0)
     {
         executeQueryMimeInfo = new ClientRequest.ExecuteQueryMimeInfo();
         this.RequestExecutor.RequestContentType = executeQueryMimeInfo.ContentType;
     }
     Stream requestStream = this.RequestExecutor.GetRequestStream();
     if (executeQueryMimeInfo != null)
     {
         this.WriteMimeStream(executeQueryMimeInfo, sb, requestStream);
     }
     else
     {
         sb.WriteContentAsUTF8(requestStream);
     }
     requestStream.Flush();
     //Edited for .NET Core
     //requestStream.Close();
     requestStream.Dispose();
     this.RequestExecutor.Execute();
     this.ProcessResponse();
 }
 private void WriteMimeStream(ClientRequest.ExecuteQueryMimeInfo mimeInfo, ChunkStringBuilder sb, Stream requestStream)
 {
     MimeWriter mimeWriter = new MimeWriter(requestStream, mimeInfo.Boundary);
     mimeWriter.StartPart();
     mimeWriter.WriteHeader(MimeGlobals.ContentIDHeader, mimeInfo.MainPartCid);
     mimeWriter.WriteHeader(MimeGlobals.ContentTransferEncodingHeader, "8bit");
     mimeWriter.WriteHeader(MimeGlobals.ContentTypeHeader, "application/xop+xml;charset=utf-8;type=\"application/xml\"");
     mimeWriter.WriteHeader(MimeGlobals.ContentLengthHeader, sb.Length.ToString(CultureInfo.InvariantCulture));
     sb.WriteContentAsUTF8(mimeWriter.GetContentStream());
     foreach (StreamInfo current in this.SerializationContext.Streams)
     {
         mimeWriter.StartPart();
         mimeWriter.WriteHeader(MimeGlobals.ContentIDHeader, "<" + current.Id + ">");
         mimeWriter.WriteHeader(MimeGlobals.ContentTransferEncodingHeader, "binary");
         mimeWriter.WriteHeader(MimeGlobals.ContentTypeHeader, "application/octet-stream");
         mimeWriter.WriteHeader(MimeGlobals.ContentLengthHeader, current.Stream.Length.ToString(CultureInfo.InvariantCulture));
         Stream contentStream = mimeWriter.GetContentStream();
         ChunkStreamBuilder.CopyStream(current.Stream, contentStream);
         //Edited for .NET Core
         current.Stream.Dispose();//.Close();
     }
     mimeWriter.Close();
 }