Contact person: Business Client

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Location: Hyderabad, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I have a small .NET Framework executable that reaches a public website through HttpClient. Opening more than one instance of the app immediately triggers the site’s “session expired” response, yet the same workflow in a browser never fails. I have already inspected the session ID that our code receives, but that alone didn’t solve it and I’m not sure whether extra headers or cookies need to be managed differently.

I need you to:
• Analyse the current HttpClient setup, cookie handling, and any default headers it sends.
• Identify why parallel instances conflict and cause the server-side session to disappear.
• Deliver a concise fix—code changes or configuration tweaks—and a brief explanation so I can reproduce the solution in similar apps.

A working proof (updated source or patch file) and a short “why it broke / how it’s fixed” note are all that’s required." (client-provided description)