Upgrading a Blazor WebAssembly Azure Static Web App from .NET 5 to .NET 6
In this post, I briefly discuss the process of upgrading a Blazor WebAssembly App from .NET 5 to .NET 6.
In the last year or so, I've been working on a Blazor WebAssembly project called Blast Off with Blazor. It's a Blazor WebAssembly app hosted on the Azure Static Web Apps service, which recently went GA. Right now, it consists of four small projects: an Azure Functions API project, a project for the Blazor WebAssembly bits, a project to share models between the two, and a test project.
I wanted to see how easily I could upgrade the Blazor project from .NET 5 to .NET 6. With .NET 6 now on Preview 4, it's evolved enough where I'm ready for an upgrade. I was hoping I could double-click the project file, change my client and test projects from net5.0 to net6.0, and be on my way. (I also know I was being very optimistic.)
After upgrading the TFM, I was able to run the app successfully. Great. I started this app using .NET 5 and its mature API surface, so I didn't expect any issues there. The interesting part is deploying it to Azure Static Web Apps. Azure Static Web Apps uses the Oryx build system and I wasn't too sure if it supported .NET 6 yet. It does, and it deployed to Azure Static Web Apps on the first try.
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What about upgrading Azure Functions to .NET 6?
Recently, the Azure Functions team announced initial support of running Azure Functions on .NET 6. This currently requires running a preview release of Azure Functions Core Tools V4. So, I could get this working locally but the support won't come to Azure Static Web Apps until we get closer to .NET 6 GA in November 2021. I'll upgrade it then. For me, I'd rather upgrade the Blazor project so I can take advantage of things like hot reload, AOT, and JSON serialization improvements.