The HTTP request is unauthorized with client authentication scheme 'Anonymous'. The authentication header received from the server was 'NTLM'

I was getting above error while accessing User Profile web service, after searching online I have found to resolution in which first I need to disabled Anonymous access on web service level and needs to make security changes into app.config file. after this changes my code was working fine.

Reference Link: http://stackoverflow.com/questions/3940703/not-authorized-for-search-asmx-web-service