Got a .NET or ASP.NET application throwing errors, behaving unexpectedly, or failing in production? I specialize in fast root-cause diagnosis and resolution of C# and VB.NET applications across MVC, Web API, WCF, and Windows Services. With 26 years of .NET development experience across defense, finance, and healthcare systems, I've seen virtually every failure mode. Services include: production bug diagnosis and fixes, ASP.NET Core API debugging, Windows Service troubleshooting, Entity Framework and ADO.NET data layer issues, and performance bottleneck resolution. Most bug fixes are scoped and resolved within one engagement.