Xamarin.Forms built from source missing UWP WindowsPage

[davidpsaylor]

Description

Hello, I'm trying to build Xamarin.Forms to debug some binding exceptions I was getting while migrating PCL to .NET Standard.

I followed the instructions at "Debugging Xamarin Open Source Frameworks: Part 1 – Xamarin.Forms". The machine is Windows 10 Version 10.0.17134 Build 17134, building source code from github with tag release-3.3.0-sr1.2 (commit 9e72c50). The compile completes just fine, and I made the local nuget repository and linked it to the solution.

I get just one compile error:

\obj\x86\Debug\MainPage.g.i.cs
namespace MyProject.NETCore.UWP
{
partial class MainPage : global::Xamarin.Forms.Platform.UWP.WindowsPage
{

Severity Code Description Project File Line Suppression State
Error CS0234 The type or namespace name 'UWP' does not exist in the namespace 'Xamarin.Forms.Platform' (are you missing an assembly reference?) MediView.Mobile.NETCore.UWP C:\git\MEDIVIEW\MediView.Mobile.NETCore\MediView.Mobile.NETCore.UWP\obj\x86\Debug\MainPage.g.i.cs 13 Active

I've tried cleaning, rebuilding, unlinking, linking directly, nothing seems to help. The Xamarin.Forms.Platform DLL is in the nuget package. Any idea why it wouldn't be recognized?

Steps to Reproduce

1. Git clone Xamarin.Forms repository.
2. Checkout tag release-3.3.0-sr1.2 (commit 9e72c50).
3. Build the project.
4. Run the .create-nuget.bat
5. Create local

Expected Behavior

Self-compiled nuget package should be drop-in replacement for actual nuget package.

Actual Behavior

Compiler complains on missing class Xamarin.Forms.Platform.UWP.WindowsPage.

Basic Information

• Version with issue:
• Last known good version: None
• IDE: Visual Studio 2017 15.9.1 (latest)
• Platform Target Frameworks:
  
  
  
  • UWP: 16299
  
  
• Android Support Library Version: N/A
• Nuget Packages: Self-hosted
• Affected Devices: Windows computer

Reproduction Link

[Poteyek]

I have the same problem with 3.4 branch on UWP and Android.

On Android when you build a project it shows following erros:

1. CS0234 The type or namespace name 'Platform' does not exist in the namespace 'Xamarin.Forms' (are you missing an assembly reference?) TestXamarinForms.Android ...\TestXamarinForms\TestXamarinForms.Android\MainActivity.cs Line: 13
2. CS0234 The type or namespace name 'Forms' does not exist in the namespace 'Xamarin.Forms' (are you missing an assembly reference?) TestXamarinForms.Android ...\TestXamarinForms\TestXamarinForms.Android\MainActivity.cs Line: 21

[YGuerin]

Some informations given here : https://forums.xamarin.com/discussion/comment/355515
(but I assume that the author of this issue and from the post are actually the same person)