asp.net mvc - SignatureDoesNotMatch in aws s3 c# while getting presigned url -

hi have mvc application in want url of uploaded image in amazon s3 after getting url not able open in browser code url is

  var expiryurlrequest = new getpresignedurlrequest();         expiryurlrequest.bucketname = bucket_name;         expiryurlrequest.key = "uploads/participantid_" + v1+ "/taskid_" + v2 + "/" + 0 + ".mp4";         expiryurlrequest.contenttype = "video/mp4";         expiryurlrequest.expires = datetime.now.addyears(10);       string    url = client.getpresignedurl(expiryurlrequest); 

i url after pestling browser show signature not match.

after generating presigned url , binding html. signature hex value changing asci symbols.

make sure create signature presigned url without hex value