Fsharp.Core MissingMethodException when using Chessie from Paket.Core

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Hello, I have a weird issue on chessie when using paket.core

Description

Fsharp.Core MissingMethodException when using Paket.Core with latest version of Chessie

Repro steps

Install Paket.Core in a VSIX solution. Try using the FindOutdated or Update command from the library --> Fail with MissingMethodException

Known workarounds

Update the target framework for Chessie F# project from 4.0 to 4.5 (I tried this using paket.local for chessie) No more exception.

Maybe a upgrade to framework 4.5 could be done on the main project, knowing that Chessie.CSharp.Test and Chessie.Tests are already on 4.5

Thanks, Thomas