Hard to override _IncludeWindowsSDKRefFrameworkReferences

[andrew-boyarshin]

I can't override _IncludeWindowsSDKRefFrameworkReferences and set it to false without explicit MSBuild SDK import elements (<Import Sdk="Microsoft.NET.Sdk" />) or setting DisableImplicitFrameworkReferences to true, which disables too much. It makes it very hard to build CsWinRT repo with 5.0 RC1 SDK.
Ref: #12232

[marcpopMSFT]

@andrew-boyarshin have you talked to the cswinrt repo owners to find out if they have updated their projects for the 5.0 SDK? Not all repos may have updated to support some of the recent changes in the 5.0 SDK. Also, can you provide more details about how it's failing or a binlog as we think this should work? Note that we don't intend customers to modify the _ properties so it'd be good to understand if this is going to be needed.

[marcpopMSFT]

Taking a closer look, it's in Microsoft.NET.Windows.targets so you don't have a way to override this so we may need to make that property conditional and then have the cswinrt repo owners set that.

[marcpopMSFT]

#13678