Using RTM VS 2017 (and last preview from 3/16/2017) I cannot get Xamarin Forms IntelliSense to work in a common project that targets NetStandard 1.4. It works in PCL, but as soon as I target NetStandard (or create a new NetStandard-oriented project library), I don't get IntelliSense. Here is the relevant section of the CSPROJ file:
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<TargetFramework>netstandard1.4</TargetFramework>
<PackageTargetFallback>$(PackageTargetFallback);portable-net45+net45+wp8+win81+wpa8;uap10.0;net46</PackageTargetFallback>
<AssemblyName>MyApp.AppX</AssemblyName>
<RootNamespace>MyApp.AppX</RootNamespace>
</PropertyGroup>
</Project>
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