Bertrand LeRoy started using .NET with the first public betas, then proceeded to write a CMS with it. That's when he moved to the US and joined the ASP.NET team that was working on ASP.NET 2.0 at the time. He's worked on ASP.NET Ajax (including UpdatePanel, yes), co-founded the Orchard CMS project, and is now working as a Program Manager on .NET Core.
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