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Migration

.NET Framework to .NET 8 Migration

Plan a .NET Framework to .NET 8 upgrade: API surface, IIS hosting, and a checklist you can run before hiring a contractor.

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from$120 / week

Final trial fee is based on the candidate profile and seniority you select.

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Framework 4.x apps do not get new runtime work. .NET 8 is the LTS landing zone we use for APIs, workers, and most MVC ports. This page is the pre-engagement checklist.

Checklist

  1. List every csproj, Framework version, and Windows-only API (Registry, WCF, System.Web, AppDomains).
  2. Decide per project: in-place upgrade, strangler sidecar, or leave-as-is behind a facade.
  3. Port test projects first so the new TFM has a gate before UI or IIS work.
  4. Replace System.Web and WCF with ASP.NET Core and a supported RPC or HTTP contract. Do not wrap the old stack in a compatibility shim as the end state.
  5. Move hosting from old IIS-only packages to ASP.NET Core module or a Windows Service / container you can patch.
  6. Start a 1-week paid trial on one vertical (one API + one database) before you buy a multi-month program.
Get a contractor on the first slice

The checklist stays on this page. This button opens the contact form.

FAQ

Do you upgrade to .NET 8 or .NET 9? +

Default is .NET 8 LTS unless you already standardized on 9 and accept the support window.

What about WinForms or WPF? +

Those can target modern .NET; they are not 'web MAUI'. We scope desktop separately from ASP.NET ports.

Will you rewrite the domain? +

Not by default. The first pass is TFM, packages, and hosting. Domain rewrite is a later SOW if you ask for it.

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