Add .NET core 3 library to UWP project

Hi all, I’ve created a solution in VS2019 containing a .NET core 3 class library (base) and UWP application (client) using the W10 version 1903 build 18363. But I’m unable to add a reference to base in the project client. I cannot use a .NET standard library because I need to reference a gRPC project in my library and that requires at least .NET core library…
How can I fix that? if possible…
Thank you in afvance for your suggestions

My mistake :frowning: I confused UWP and WPF. As far as I know, UWP is not supported by .NET core which does not really help me as I need gRPC from my UWP app…

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