In Xamarin, if you observe / subscribe to a particularly-named NSNotification in an object that is IDisposable (this includes any class descended from NSObject!), you MUST explicitly unsubscribe from it in your Dispose handler, or you will get a segfault (the system will attempt to call a method at a memory …

I totally forgot a frustrating detail about showing 3D buildings in iOS 7 : it doesn't work in the simulator! You have to use a hardware device!

You cannot rely on the value of UIWebView.CenterCoordinate after setting UIWebView.SetCenterCoordinate and I don't know of any event that is raised when it is finally set. To be more specific:

var map = new MKMapView();

var ctr = new CLLocationCoordinate2D(37.8, -122.4);
map.SetCenterCoordinate(ctr, false);
map.SetRegion …

This post contains links and references to subjects discussed in my MonkeySpace 2013 talk.

Naturally, the talk was grounded in Xamarin Studio.

Xamarin's Field Service App is a reference implementation for cross-platform MVVM.

The Xamarin DCI example source code can be found here.

Essential books on software-architectural patterns:

• Design Patterns …

Easily:

< ![CDATA[
[Activity (Label = "HelloBarometer", MainLauncher = true)]
public class Activity1 : Activity, ISensorEventListener
{
    TextView mainLabel;  

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);
        // Set our view from the "main" layout resource
        SetContentView(Resource.Layout.Main);
        //Detect the barometer
        var sm = (SensorManager) this.GetSystemService(Context.SensorService);
        var barry = sm.GetDefaultSensor(SensorType …