httpwebrequest creating duplicate requests in case of timeout

We have created a web service in which we are using httpwebrequest get method. In some cases the request received by the server is duplicated when time out occurs (Not happens with all time out requests). Time stamp of the duplicate requests mentioned below and diffrenece showing some time 45 seconds, sometime 3 seconds and some time same time. Can you provide some solution for the same issue.

u_ex171120.log:2017-11-20 06:12:04 10.1.224.70 GET {url} - PORT - IP - - 200 0 64 0 249 58488

u_ex171120.log:2017-11-20 06:11:19 10.1.224.70 GET {url} - PORT - IP - - 200 0 64 0 249 39219