Practitioner notes on moving old systems safely
September 9, 2026 · Relicbridge
Login is the slice every other slice depends on. How to share one authentication cookie between a legacy WebForms app and a .NET 8 slice, move Membership password hashes into ASP.NET Core Identity without a mass reset, and hand sign-in to the customer identity provider.
Read moreSeptember 9, 2026 · Relicbridge
Legacy WebForms, VB6, Access and Classic ASP systems drive Excel through COM automation on the server. Here is how we find every call site, choose a replacement per output, rebuild it with ClosedXML or the Open XML SDK, and prove the new file matches the old one.
Read moreSeptember 9, 2026 · Relicbridge
Reports are usually the largest uncounted item in a legacy migration. Here is how we inventory a Crystal or Access report library, sort it into four buckets, keep the rest running on a report island, and prove the output still matches.
Read moreSeptember 9, 2026 · Relicbridge
Before anyone quotes a Classic ASP rewrite, measure the thing: an include graph, a COM dependency list, the inline SQL count, and IIS logs that tell you which pages are actually used. Here are the commands we run in the first two days.
Read moreAugust 23, 2026 · Relicbridge
The control-by-control translation table we use when rebuilding WebForms pages on Blazor, and the parts that refuse to map.
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