Recently I ran into an issue where code worked perfectly fine in Debug mode, but not in Release mode. It was on a Xamarin.Android project using MvvmCross and certain bindings did not work as expected in Release mode. Bonus points if you already know what the issue is :). For those of you who don’t, stay with me.

So, first thing you do is check out the Android Build options for the Debug and Release configurations and see what’s different between the two.

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Sometimes I come across (small) tips and tricks, gotchas or gems while working on Xamarin projects, so I thought let’s put those in a Xamarin Tips and Tricks series. I’ll kick off the series with some info on UriImageSource.

As you probably know you can set the Source of an Image from several locations, i.e. File, Resource, Stream or Uri. The UriImageSource loads an image from a Uri and then caches the results.

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As I mentioned in my previous postTestFlight has been acquired by Apple and will be discontinued on February 26, 2015, which is, eh, soon. Instead, they offer the “All-New TestFlight Beta Testing service available inside of iTunes Connect“.

So this post was going to be about moving to this new All-New iTunes Connect TestFlight Beta Testing service provided by Apple.

However, while investigating this new service I quickly stumbled upon so many issues with their service that renders it quite useless. Let me name a few:

  1. Apps made available to External Testers (testers that are not a member of your team in iTunes Connect) require a Beta App Review and must comply with the full App Store Review Guidelines before testing can begin. A review is required for new versions of your app that contain significant changes.
  2. A submitted build will be available for only 30 days after invitations to the testers have been sent.
  3. Enterprise (in-house) distribution builds are not supported, only App Store builds.
  4. Only support for iOS 8 and up. Really?
  5. There is no upload API which is kind of a deal breaker in a CI scenario. There is a workaround for this using deliver from fastlane which looks like a great toolset for automating iOS builds. I just happened to hear about fastlane last week in a recent episode of the Gone Mobile podcast. Sounds really interesting and I might give that a try some day.

Wow, that’s a lot of drawbacks! This led me to look for a different app distribution platform. A quick search gives you a number of options, such as,  http://installrapp.com and

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