ServiceStack.HttpResponseExtensionsInternal.WriteToOutputStream C# (CSharp) Method

        public static bool WriteToOutputStream(IResponse response, object result, byte[] bodyPrefix, byte[] bodySuffix)
        {
            var partialResult = result as IPartialWriter;
            if (HostContext.Config.AllowPartialResponses && partialResult != null && partialResult.IsPartialRequest)
            {
                partialResult.WritePartialTo(response);
                return true;
            }

            var streamWriter = result as IStreamWriter;
            if (streamWriter != null)
            {
                if (bodyPrefix != null) response.OutputStream.Write(bodyPrefix, 0, bodyPrefix.Length);
                streamWriter.WriteTo(response.OutputStream);
                if (bodySuffix != null) response.OutputStream.Write(bodySuffix, 0, bodySuffix.Length);
                return true;
            }

            var stream = result as Stream;
            if (stream != null)
            {
                if (bodyPrefix != null) response.OutputStream.Write(bodyPrefix, 0, bodyPrefix.Length);
                stream.WriteTo(response.OutputStream);
                if (bodySuffix != null) response.OutputStream.Write(bodySuffix, 0, bodySuffix.Length);
                return true;
            }

            var bytes = result as byte[];
            if (bytes != null)
            {
                var bodyPadding = bodyPrefix?.Length ?? 0;
                if (bodySuffix != null)
                    bodyPadding += bodySuffix.Length;

                response.ContentType = MimeTypes.Binary;
                response.SetContentLength(bytes.Length + bodyPadding);

                if (bodyPrefix != null) response.OutputStream.Write(bodyPrefix, 0, bodyPrefix.Length);
                response.OutputStream.Write(bytes, 0, bytes.Length);
                if (bodySuffix != null) response.OutputStream.Write(bodySuffix, 0, bodySuffix.Length);
                return true;
            }

            return false;
        }