Here are @BrandonMinnick's build optimization tips he shared recently on Twitter.

https://github.com/brminnick/ImproveXamarinBuildTimes

@NANNDA

I used Xamarin.Firebase.Database in a shared project in Xamarin.Forms in Visual Studio and it works. At the moment I am only focusing on an iOS version of an App but the setup is similar for Android.

• Make sure your App's bundle ID is the same in your project and in the Firebase App on the website.
• Download the Google Services .plist file that contains the database configuration and include it in the platform - mine is placed in App.iOS in the same directory as info.plist.
• Add the file as a BundleResource
• In the AppDelegate class I did using FIR = Firebase.Analytics and in the finished launching method just above the return statement I did: FIR.App.Configure()

This is the only setup I needed. I attached all my listeners in my shared code and it works. I can't see why it shouldn't work for PCL but also I haven't tried it.

Use the PropertyChanged delegate you specify in BindableProperty.Create().

public static readonly BindableProperty IsDirtyProperty = BindableProperty.Create( nameof( IsDirty ), typeof( bool ), typeof( DrivesView ), false, BindingMode.TwoWay, propertyChanged: OnIsDirtyChanged );

private static void OnIsDirtyChanged(BindableObject bindable, object oldValue, object newValue)
{
    ((DrivesView)bindable).CallThis();
}