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Upgraded Visual Studio and receive build error "Type 'Desktop' is not defined"

Upgraded Visual Studio and receive build error "Type 'Desktop' is not defined"

Issue was caused by a Visual Studio configuration issue in the project. Known Visual Studio issue reported online.

You need to make sure that the consuming project is targeting a .NET Framework version which is equal to or higher than the other project that it is referencing. If the referenced project is targeting a higher version of the framework, Visual Studio will not give you a useful message like, "Wrong Framework Version".

Setting the Target Framework to the latest version and rebuilding the solution/project resolves the issue.

1. Open the properties of the project
2. Set the Target Framework to your highest version.
3. Rebuild the Solution/Project.

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