I am integrating Amazon MWS Product API into my application using the IRestClient method. But I am getting this error ( Sender
SignatureDoesNotMatch The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details. ). I tried all the way, I am sending the Params also order by Asc only, but Still I am facing this issue. I am working c# asp.net project.