Hello @水 知 ,
Welcome to Microsoft Q&A!
How to Change C# Version of a UWP Program?
We cannot change the C# version of UWP project.
I want to use new version C# in my UWP APP, such as C# 11 or even C# 12,
According to the document C# language versioning, UWP supports up to .NET Core3.0, So the C# version of UWP is up to C#8.0.
Thank you.
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