Hello,
.net 9 is in the preview stage and has not been officially released. If you want to know what changes have taken place in MAUI in .net 9, you can refer to the following documents.
If you want to develop with .net 9 in advance, you need to install the SDK and install the MAUI .net 9 project template using the dotnet new install Microsoft.Maui.Templates.net9
command. After that, you can create a MAUI project in Visual Studio 2022 or higher.
Best Regards,
Alec Liu.
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