When using XAML compilation, binding to command whose class definition is in external project generates an error

[ptsoccer]

Description

When using compile time data bindings, binding a button's command to a command whose class definition is in another project generates:

Member '<class name>' is declared in another module and needs to be imported

Steps to Reproduce

1. Create two projects, one being a xamarin forms project and one being a .NET standard 2 project and have the xamarin forms project reference the .NET standard 2 project
2. In the .NET standard project, create a view model class and implementation of ICommand. Have the view model have an instance of the ICommand implementation.
3. Turn on XAML compilation in the xamarin forms project
4. Create a button in the xamarin forms project and bind its command to the command property on the view model
5. Compile the xamarin forms project

Expected Behavior

The project should compile successfully

Actual Behavior

An error is returned:
Member 'ViewModel.DelegateCommand' is declared in another module and needs to be imported

Basic Information

• Version with issue: 2.5.1 and 3.0-pre3

Reproduction Link

XamarinStaticBinding.zip

[StephaneDelcroix]

that's an issue in the BindingsCompiler