ASP.NET Core 2.3 support ends April 13

This is less a launch than a hard modernization deadline, and Microsoft is being blunt about the tradeoff: stay put and own the risk, or upgrade and reap the gains from modern .NET. The date was also updated from April 7 to April 13, 2027 to align with Microsoft servicing cycles.

• –ASP.NET Core 2.3 is now legacy enough that Microsoft no longer recommends it as a migration strategy.
• –After support ends, the included Entity Framework 2.3 packages lose support on the same date.
• –Teams that stay on it give up security fixes and technical support, which turns maintenance debt into real exposure.
• –Microsoft is explicitly pointing developers to currently supported .NET versions, including .NET 10 LTS.
• –The Copilot modernization angle matters: upgrades like this are increasingly about inventorying code, planning refactors, and automating migration work.