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Roland Weigelt

Born to Code


UWP Community Toolkit 1.3 Released – now with Markdown

Sun, 26 Feb 2017 17:32:43 GMT

A new version of the UWP Community Toolkit has been released, this article on the Windows Developer website has the details on what’s new.

One thing that caught my eye was the MarkdownTextBlock XAML Control that does exactly what the name implies: You set the Text-property with some Markdown text and it shows the rendered Markdown. You can change the styling of the output (font size, color, etc.) to match your application or a specific desired document style. And the LinkClicked event tells you when a link has been clicked.

If you want to see it (and all the other toolkit features) in action, download the UWP Community Toolkit Sample App in the Windows Store.


How good is it?

If you’ve used Markdown in more than one application or website before, you’ll know that there are smaller and larger differences here and there (the website for CommonMark has more on that).

Playing around with the control to learn more, I found the following:

While this list makes it sound like there are a lot of things that aren’t working (yet) or are missing, it is important to consider use cases for the control.

  • Do you plan to display arbitrary Markdown like files from GitHub?
  • Or do your want a control to display explanation texts on a form (where you write all the markdown)?

If the latter is the case, the control most likely will do its job already in version 1.3, with the tables and images coming in version 1.4 being a welcome addition, of course.

20 Years at the Same Company

Sun, 15 Jan 2017 18:50:00 GMT

Ten years ago I wrote a blog post that I simple re-use here:

Today, exactly ten 20 years ago, I started working at Comma Soft here in Bonn, Germany, coming straight out of university. Just amazing how fast time has gone by. Ten years at the same company is even more amazing considering the fact that I originally had planned to stay maybe one or two years, just enough to gain some professional experience, and then move on.

But towards the end of 1997 I joined what would later become the infonea INFONEA product team. Working in a team of nice and intelligent people (neither nice bozos nor intelligent back-stabbers are helpful in the long run), using a wide array of different technologies over the years, made me stay. […]

The two TFT screens in the photo of the original blog post have been replaced by three 24” screens. My keyboard is now one without number keys (same key switches as the old one), but the desk is still the same and I’m still in the same office.

I’m no longer working as a (full-time) software developer, having moved to user experience and product design. I also took on the herculean task of consolidating all documentation efforts into one single-source system (using MadCap Flare), which has both technical as well as editorial aspects.

Code, graphics, concepts, words – I’m doing it all; things are definitely not getting boring here!

dotnet Cologne 2017 am 4./5. Mai 2017

Wed, 21 Dec 2016 00:06:48 GMT


Am 4. und 5. Mai 2017 findet in Köln zum neunten Mal die dotnet Cologne statt. Die mit 400 Teilnehmern größte deutsche Community-Konferenz für Software-Entwickler im Microsoft-Umfeld wird von Stefan Lange und Melanie Eibl (dotnet Köln/Bonn e.V.), Albert Weinert (.net user group Köln) und mir (Bonn-to-Code.Net) organisiert. Zusammen mit Sprechern, Sponsoren und Helfern vor Ort veranstalten wir die dotnet Cologne als eine Konferenz, die sich jeder leisten kann und die wir selbst gerne besuchen würden.

Das “…die wir selbst gerne besuchen würden” nehmen wir dabei durchaus ernst. Ebenso ernst nehmen wir das Feedback der Teilnehmer, das einerseits sehr positiv ist (was natürlich motiviert), anderseits viele konstruktive Vorschläge liefert.

Ein häufiger Wunsch der Teilnehmer war ein eigener Workshop-Tag, um ein Thema einmal etwas ausführlicher behandeln zu können. Da die Buchung von Räumlichkeiten – vorsichtig ausgedrückt – eine relativ langfristige Angelegenheit ist, hat es etwas gedauert, aber am Donnerstag, den 4. Mai, ist es endlich soweit. Genaue Informationen zu den Workshops folgen noch, aber das Angebot verspricht sehr interessant zu werden!

In eine ganz andere Richtung gehen die sog. “Lightning Talks”, Kurzvorträge von maximal 15 Minuten (plus 5 Minuten für Fragen). Diese Vorträge sind einerseits dafür gedacht, kurz und knapp in ein Thema einzuführen. Andererseits geht es uns dabei darum, das unter den Teilnehmern vorhandene Know How besser zu nutzen. Nicht jeder hat die Zeit, eine komplette 60-Minuten-Session vorzubereiten, aber ein 15-Minuten-Vortrag ist sowohl zeitlich als auch inhaltlich vielleicht eine andere Angelegenheit.

Daher an dieser Stelle der Aufruf (gültig bis zum 3. Februar 2017):

Kurzvorträge gesucht!

  • Du kennst ein cooles Open Source-Tool und möchtest es vorstellen?
  • Du hast positive Erfahrungen mit einer Bibliothek oder einem Framework gemacht?
  • Du hast Dich mit einem interessanten Konzept beschäftigt, von dem mehr Leute erfahren sollten?
  • Du möchtest andere vor Fallstricken warnen ("Fünf Dinge, die ich gerne früher über X gewusst hätte")?
  • Du hast Tipps zum Thema Softskills und Teamdynamik?
  • Du kennst Yoga-Übungen für Bildschirmarbeiter?
  • ...oder Du hast noch eine ganz andere Idee?

Dann gehe schnellstens auf, dort gibt es alle Infos.

Als Belohnung winkt ein kostenloses Ticket für den 5. Mai, komplett ohne Anmeldestress!

Black Friday Deal for OzCode

Thu, 24 Nov 2016 23:37:00 GMT

Back in 2015, I discovered OzCode, an awesome C# debugging tool, at an exhibitor booth at the Microsoft Build conference. Not only was the in-person-demo at the booth convincing, the website also did an amazing job explaining the features.

When I returned home, I bought a personal copy for my hobby projects (I rarely write code at work these day, focusing on product design, UX and documentation) – and I enjoy using ever since.

Visit, scroll down a bit and watch the videos for “Magic Glance”, “Search” and the other features. You’ll see why I’m such a fan. I can wholeheartedly recommend this tool, which costs $79 for a personal license.

The reason why I’m writing about OzCode now: There’s an “Black Friday” offer for a personal license at 50% OFF, valid until November 27, 2016. Just follow the link on this tweet:

How to fix Your Open Live Writer Account Settings for

Fri, 07 Oct 2016 17:51:47 GMT

When I tried to post on my blog ( yesterday using Open Live Writer, it failed with an error message – I ended up posting via the web interface.

I contacted the ASP.NET website support and today Terri Morton got back to me, telling me that an update of the website last week forces https and that I should point my blog account to Interestingly, it was already set to https.

Adding a new account in Open Live Writer is really easy, so I tried that, but it didn’t work. Looking at the error message, a mix of https and http URIs caught my eye:


Digging in the registry, I found the following entry

      • OpenLiveWriter
        • Weblogs
            • PostApiURl =

After changing the URL from http to https and restarting Open Live Writer, my blog account worked again – this post is living proof.

UWP Community Toolkit 1.1 Released

Thu, 06 Oct 2016 20:28:25 GMT

Back in August I blogged about How to Search Twitter from Your UWP App using the then-new UWP Community Toolkit. Of course, the toolkit offers much more than that. It has now been updated to version 1.1, with quite a list of improvements and fixes. A small, but nice addition is the GridSplitter, which was one of the first things I was missing when moving from WPF to UWP.

The release also sends a strong signal about the future of the UWP Community Toolkit. It is now part of the .NET Foundation (which brings a move of the documentation to a new location) and has promising community activity. While this may not be a guarantee for longevity, at least the signs point into the right direction.

“Mini-DevCon” der DevGroup Göttingen/Kassel am 21.10.2016

Thu, 06 Oct 2016 20:06:00 GMT

Die .NET DevGroup Göttingen/Kassel veranstaltet am 21.10.2016 ab 17:30 in Hann. Münden-Laubach ihr 202. Treffen, das als “Mini-DevCon”, also im Prinzip eine Halbtags-Konferenz, konzipiert ist.

Es hat mich sehr gefreut, als ich in meiner Eigenschaft als Mitglied des Sprecherbüros von INETA Deutschland angefragt wurde. Ich habe gerne zugesagt und werde in meinem Vortrag praxisrelevante Grundlagen in den Bereichen Visual- und User Interface-Design sowie User Experience vermitteln.

Das Programm der Veranstaltung sieht aktuell wie folgt aus:

  • 17:30 – 17:45 Begrüßung und Keynote (Joachim Bieler)
  • 17:45 – 18:30 Industrie 4.0 für zuhause – IoT für Otto Normalentwickler (Martin Roppert)
  • 18:45 – 19:45 Design/UI/UX-Grundlagen für Entwickler (Roland Weigelt)
  • 19:45 – 21:00 Abendessen und Verlosung
  • 21:00 – 21:45 PRISM 6 (Jürgen Goschke)

Die Teilnahme ist kostenlos, um Anmeldung wird gebeten.

How to Disable Warnings in Generated C# Files of UWP Apps

Sun, 25 Sep 2016 23:08:00 GMT

The first time I moved my UWP development beyond writing “throwaway code for learning purposes”, I did what I always do when starting a new “real” project: On the “Build” tab of the project properties, I switched the setting “Treat warnings as errors” to “All” and set the checkmark at “XML documentation file”.

Nasty surprise: When compiling the UWP app, the compiler stumbled over missing XML doc comments in code that was generated in the background.

Fortunately, I quickly found a solution on StackOverflow that automatically added a #pragma warning disabled to the generated files using MSBuild. That worked well for me until recently, when I created a new solution configuration that had a name containing spaces. Digging a bit into MSBuild, and with the help of another StackOverflow answer, I was able to figure out the following build target (which I’ll add as an answer to the original StackOverflow question):


How to use this:

  • Unload and edit your “.csproj” file in Visual Studio (or open it in Notepad if Visual Studio is closed)
  • Copy-and-paste the task just before the closing tag
  • Save and (re)open in Visual Studio

How to Search Twitter from Your UWP App

Thu, 18 Aug 2016 11:05:00 GMT

Yesterday, the UWP Community Toolkit was released, “a new project that enables the developer community to collaborate and contribute new capabilities on top of the SDK.”. The toolkit “includes new capabilities (helper functions, custom controls and app services) that simplify or demonstrate common developer tasks”.


One thing that caught my eye was the support for social media like Twitter and Facebook. I had read the docs at and I had a twitter app configured at some months ago, but I never got around to actually choose a Twitter access library and use it.

But the few lines of sample code in the announcement (how to post a tweet) looked so simple I couldn’t resist trying to perform a Twitter search.

  • Follow the “Getting Started” instructions in the article. (I chose the packages Microsoft.Toolkit.Uwp and Microsoft.Toolkit.Uwp.Services)
  • Put a button on the form, create a click handler with the following code:
    private async void HandleButtonClick(object sender, RoutedEventArgs e)
    	TwitterService.Instance.Initialize( // change (1) - (3) for your app
    		"(1) ConsumerKey",
    		"(2) ConsumerSecret",
    		"(3) CallbackUri"); 
    	await TwitterService.Instance.LoginAsync();
    	tweets = await TwitterService.Instance.SearchAsync("hello world");
    	foreach (var tweet in tweets)
  • And that’s all it is to search Twitter for e.g. “hello world”!

Things to note:

  • Even though the API is really easy, it doesn’t mean that you can avoid reading or at least scanning the Twitter documentation altogether – you need to know just enough the get the required information for login.
  • Storing the ConsumerKey and ConsumerSecret in an app as plain text doesn’t sound like a good idea – I’ll have to read up on what best practices are in regard to security.

My UWP Link List

Sun, 17 Jul 2016 15:32:25 GMT

I’m still at the beginning of my journey into the world of Universal Windows Platform (UWP) apps. In this blog post (which will be updated over time) I’ll collect various links to resources I found interesting and/or helpful – maybe they are of use for other people, too.BasicsThe Windows Dev Center ( is the starting point for Windows development. Documentation, downloads, samples – it’s here.Get started with Windows apps contains everything to, well, get started. I doubt you’ll find a more clear and concise information about how to do it than this page and its sub-pages (in the past, people actually made it their job to extract information out of wordy Microsoft articles).Back in the Windows 8.x days, side-loading didn’t sound too attractive. Much has changed in Windows 10 and this article sums it up: Sideload LOB apps in Windows 10And things are looking to get even better soon: App Installer! (via Universal Windows App Deployment blog)I wanted a code-signing certificate (not only for my future UWP apps), in the end I chose KSoftware who are an official partner of Comodo.DebuggingHow to trigger suspend, resume, and background events for Windows Store apps in Visual StudioResourcesGeneralBlog: Building Apps for Windows (by the Windows Apps Team)Article: The Lifecycle of a UWP AppArticle: The path from a desktop app to a Universal Windows Platform (UWP) appArticle: Optimizing your XAML app for performance (10 by 10)Website: Develop UWP apps – How-to articles for UWP apps on Windows 10 (“Instructions and code examples for all kinds of tasks, such as using geolocation services, transferring data over a network, and porting apps to Windows 10”)ArchitectureTemplate 10 is a set of Visual Studio project templates that take care of boilerplate stuff like navigation and suspensionVisual Studio Extension: Template 10 Template PackWiki: DocumentationVideo: Getting Started with Template 10 (on Microsoft Virtual Academy)App ServicesApp Services are a very interesting concept for UWP applications that are more than just a simple self-contained “app”.Create and consume an app serviceConvert an app service to run in the same process as its providerCalling an App Service from a WPF/WinForms Win32 AppLaunch a Universal App from a WPF App contains the important part of how to reference Windows 10 APIs. When copying the XML code snippet in the blog post, leave out the reference to System.Runtime.dll and make sure you replace the typographical quotes (“example”) with plain quotes ("example"). App Services in a Network Discover remote devicesLaunch an app on a remote deviceCommunicate with a remote app servicePersonal InterestsMy main motivation to start with UWP apps is to use the graphics and video capabilities that look much more attractive than what WPF has to offer.Graphics and AnimationsBlog: robmikh blog (“A development blog about all things UWP and Composition”)Blog: Mike Taulty (“I do some developer stuff for Microsoft UK”)Articles on composition: on Win2D: Windows 10 Anniversary Update–Fun with Composition and VideoWebsite: Windows UI Dev Labs on github (“the place for getting the latest code samples and demos using Windows.UI.Xaml and Windows.UI.Composition to make beautiful Universal Windows Platform applications”)Article: How to prevent screen locks in your UWP appsArticle: Creating a FluidBanner control using Windows CompositionLibrary: CompositionProToolkit on github (“Collection of Helper classes and controls (using Win2d) for Windows.UI.Composition”)MediaPlayerAPI referenceArticle on Windows Dev CenterVideo Shenanigins (article by Make Taulty)TroubleshootingSolutions for issues I ran into:How to disable “Missing XML comment” war[...]

The Search for a Proportional Font for Developers

Tue, 14 Jun 2016 22:28:00 GMT

Text editors and IDEs usually use monospaced, i.e. non-proportional, fonts by default. This may seem like an obvious choice – after all, how else do you line up characters horizontally? The disadvantage of a monospaced font is that text lines can become relatively wide, because by definition, all characters have to have the same width as the character that requires the most space (the uppercase “W”). Back in the 80ies and early 90ies, with identifier names like “strnicmp()”, this wasn’t much of an issue. But then libraries grew and identifier names got longer and longer. At the same time, in my IDE the source code editor on one hand and an increasing number of additional panes on the other hand were competing for screen space. In the editor, I usually had a ton of unused whitespace behind short text lines, but when a line contained a slightly longer identifier, it often got clipped. That was the point when I asked myself how important exact horizontal alignment of characters was to me. Less horizontal scrolling and better readability for long names in return for giving up full control looked like deal good enough to give proportional fonts a try. The Switch I don’t quite remember the exact time when I switched; the blog post ”My Transition from Fixed to Proportional Width Fonts for Editing Source Code” is from 2004, years after the fact. What I do remember, though, is that it was the Verdana font that made the switch final. Verdana is a sans-serif font, except for serifs for the uppercase “I” to make it easily distinguishable from the lowercase “L”. Here’s a (wildly exaggerated) code example to demonstrate why this is important, first in Arial: …and here in Verdana: In Arial’s defense, I must say that I like Arial’s bold text much better than Verdana’s. And, for my personal taste, Verdana is a bit too wide (especially at larger font sizes). Its cousin Tahoma, on the other hand, is slightly too narrow: In the end I learned to live with Verdana, but when Segoe UI was introduced along Windows Vista, I switched immediately: Like Verdana and Tahoma, the bold version of Segoe UI is pretty thick, but I like keywords and class names being shown in bold (even if it’s too heavy). Noooooo…! After I upgraded my computer from Windows 7 to Windows 10 (I skipped Windows 8.x), I noticed Segoe UI had changed. The most dramatic change: The uppercase “I” lost its serifs (see: Segoe UI gets a subtle facelift in Windows 8)! Which means that the code example now looks like a soup of vertical bars: Searching for Alternatives With Segoe UI no longer suitable for source code and going back to Verdana not exactly an attractive option, I searched the web for alternatives. So far, I’ve come across the following fonts (in no particular order): Clear Sans (Intel, Clear Sans doesn’t seem to be hinted well enough for rendering at 10pt on a screen at around 96 pixel per inch, at least with ClearType on Windows (I don’t have a Mac for comparison). While it looks rather ugly on my machine, Clear Sans turns out pretty nice at 20pt or when I scale Visual Studio’s editor to 200%, so it may be a good choice for users with a HiDPI display. Source Sans Pro (Adobe, What I wrote about Clear Sans in regard to hinting is also valid for Source Sans Pro. For my personal taste, though, the difference between the uppercase “I” (without serifs) and the lowercase “L” (with only a small tail at the bottom) is too subtle, regardless of font size. PT Sans (ParaType, PT Sans Caption has serifs for the uppercase &[...] – THE Resource for Monospace Fonts

Mon, 30 May 2016 19:49:29 GMT

While preparing an upcoming blog post about proportional fonts for programmers, I came across a tweet by Val Head (@vlh), pointing me to The website boasts the slogan “The most complete resource for monospace fonts on the web” and looking at the list of fonts, I’m inclined to believe it.

I browsed the site for a while until finally saw the link “Try them all online right now” which was hidden in plain sight directly in front of me:


The link opens a nice web application that lets you test drive a huge number of fonts, using a text of your choice. The available themes are a matter of personal taste, but this is mainly about getting an idea whether a font looks good before spending more time on it.


Nice Time Saver: Windows Universal App Image Scaler

Sat, 30 Apr 2016 07:29:00 GMT

Recently I took my first steps into the world of Universal Windows Platform (UWP) apps after many years of WPF. What came a bit as a shock to me was the sheer number of required/recommended tile and icon assets.

Most of the images are versions of the same image, scaled to different sizes. Of course, creating these images is something that can and should be automated, starting from a sufficiently large image.

One way to handle this is via Photoshop Actions, but when looking for a simpler solution I came across the Windows Universal App Image Scaler. This is a Visual Studio extension that adds a context menu entry to the Solution Explorer. You simply right-click an image file, choose “Scale image for Windows Universal app…” and specify the kind of images you want to create. When you press “Ok”, the output will be written to the directory that contains the source image, and that’s it!

You find this nice extension

Anmeldung zur dotnet Cologne 2016 am 16.3.2016 um 12:00

Fri, 04 Mar 2016 07:30:18 GMT


Am Mittwoch, 16. März 2016, wird um 12:00 Uhr die Anmeldung zur dotnet Cologne 2016 am 13. Mai in Köln freigeschaltet. Die 400 Tickets für die letztjährige Konferenz waren in weniger als 4 Minuten verkauft, es gilt also pünktlich am Rechner zu sitzen!

Dass diese Community-Konferenz, die Stefan Lange und Melanie Eibl (dotnet Köln/Bonn e.V.), Albert Weinert (.net user group Köln) und ich (Bonn-to-Code.Net) seit 2009 zusammen organisieren, so erfolgreich ist, macht uns schon ein wenig stolz.

Gleichzeitig gilt weiterhin unsere Philosophie, dass die dotnet Cologne eine Konferenz sein soll, wie wir sie selber gerne besuchen würden. Und dazu gehört für uns nicht zuletzt, dass wir am 13. Mai möglichst viele aktive Mitglieder der deutschsprachigen .NET Community treffen möchten.

Damit dies nicht vollständig dem Zufall überlassen bleibt, haben wir uns entschlossen, einen Teil der Karten zu blocken und für Leiter und Stellvertreter von .NET User Groups, MVPs, Betreiber von Community-Foren etc., aber auch für Sprecher früherer dotnet Cologne Konferenzen und unserer User Group Treffen in den letzten 12 Monaten zu reservieren.

Weitere Infos zu dieser Aktion gibt es auf

Also: Man sieht sich am 13. Mai!

The Importance of Empathy, pt2: It’s Good for You, Too!

Sun, 28 Feb 2016 23:31:47 GMT

In my recent blog post I described empathy as a valuable skill e.g. for UI design. But empathy is more than just “that UX soft skill thing”, “for making other people’s lives better”.In this post I’ll give two real-life examples where a lack of empathy significantly reduced the chances of success in a competitive situation – which should give food for thought even to the most selfish person.Example 1: Programming Contest EntriesIn 2004 I entered a competition for Visual Studio add-ins organized by Roy Osherove. Surprise #1: I won. Surprise #2: The blog entry “About the add-in contest results” by Frans Bouma, one of the judges.He wrote: “As a judge in the add-in contest, I had to test all the add-ins submitted, and judge them on quality and if they deserved any of the big prizes available. I can tell you it was hard. Not because there were so many good entries, but because it was often very hard to even get the submitted code to run, left alone to find any documentation what to do, how to get started.”Two years later I was in Frans’ shoes when I was a judge on a German contest for “code snippets” (more in the vein of small classes and helper methods than typical Visual Studio snippets e.g. for defining a constructor or a dependency property). I had to wade through more than 120 entries, with many lacking an easy to understand description of “what does it do”, “how do I use it”, etc.In both contests, not nailing the basics substantially influenced the judgement and thus prevented some of the entries from ranking higher.What went wrong?One possible short answer: People were lazy. They did the fun part (writing code), but skipped on the non-fun part (writing docs, taking care of setup, etc.). But on the other hand, people tend to overcome their laziness if they feel some kind of urgency.In the case of the contest, it seemed that many of the participants didn’t think that the out-of-the-box experience would be a factor in the review – which hints at a lack of empathy. Because with a bit of empathy, they would have thought about the situation of a contest judge.Let’s imagine that you are a judge for a programming contest. You unpack the ZIP file containing a contest entry and you get a bunch of files you’ve never seen before.What would be your first questions? Surely something like:Where do I start?Is there some kind of README?Is there a short introduction, maybe an elevator pitch for this?What is actually the problem this thing is trying to solve?What are the first steps that I should take?Can I simply follow the directions or are there prerequisites that aren't mentioned?Is there a simple way to achieve at least something in the software quickly before I dig deeper into it?Imagine you have to review not only one or two, but dozens and dozens of entries. Wouldn’t you be thankful for any entry that addresses these questions proactively?Now, after looking at a judge’s perspective: Would you, as the author of a contest entry, assume that a judge instantly sees how awesome your software is, without any explanation beyond a few words? And that none of the other contestants would come up with the idea to make things easier for the judges and thus make a good first impression?If you can now almost feel the pressure of competition – there’s the urgency required to overcome the laziness and the reluctance to do the things that are not fun.Example 2: Conference Session ProposalsI’m one of the organizers of the community conference “dotnet Cologne” which is wildly successful and has become the largest conference of its kind in Germany. One of the many things to do for the organizers in the months before t[...]

The Importance of Empathy

Sun, 31 Jan 2016 22:53:00 GMT

Empathy is (quote) “the capacity to understand what another person is experiencing from within the other person's frame of reference, i.e., the capacity to place oneself in another's shoes”. Putting yourself in other people’s shoes If you work on a piece of software, be it as a developer, a designer or a manager, then in your frame of reference, your software is the center of the world. It’s very tempting to think that in principle, people really would like to use your software, and that UX issues can be solved by improving the existing UI. Which isn’t wrong per se – after all, careful wording of UI texts, meaningful placement and spacing of UI elements does work wonders. On the other hand, it’s easy to fall into the trap of tweaking things up to no end instead of questioning the overall interaction, i.e. “lipstick on a pig”. In the frame of reference of the user, your software is just a thing that helps him/her to get things done. Users usually don’t actually want to use your software. They want to reach a specific goal and they know or least suspect that your software may be a way (or: one way) to achieve the desired result. That result is important to the user, not the software itself. If a user has problems with the software, that user will not necessarily think “oh, how much I’d like to use this excellent piece of software, I think I’ll read the tutorial”. No; in the user’s frame of reference, the software is a problem. Whether the user solves the problem (e.g. by putting more effort in learning the software) or avoids it (by using a different software or no software at all) depends on the assumed outcome and how valuable it is to the user. Excercise in empathy: Is it worth learning git? Let’s take a little detour: The distributed version control system (DVCS) called “git” is a complicated piece of software that draws criticism and ridicule on one hand, but is powerful enough to be in widespread use on the other hand. The situation in today’s software development is pretty simple: If you need to do the things that git does very well and/or if you (intend to) work on a project that is using git, you take the plunge and learn it, period. I do not use git (at the time of this writing). At work, I use the company-provided TFS, so I don’t need git there. And at home I chose Mercurial many years ago, at a time when git wasn’t that popular on Windows yet. If you are an avid git user, it is a perfect excercise in empathy to think about the reasons why I haven’t switched yet. You have to forget about the reasons why you love git and keep my frame of reference in mind. I use Mercurial for my (closed source) hobby projects, working both on my desktop at home and my laptop on the road. I spend quite time time on my hobby projects, but this time of course is limited (other hobbies, time with the wife, etc.). Switching the version control system takes away from that time; time that I could use to write that new feature that I have in my head for so long. So in this case, the outcome of switching isn’t valuable enough. Imagine you had written a tool for a Mercurial-to-git repository conversion and would wonder whether a blue button or a green button in your tool’s UI would increase the probability of me switching – that would be the wrong question caused by the wrong frame of reference. The ability to leave your current point of view for a moment and to put yourself in other people’s shoes is a highly valuable skill. Of course it does not mean that you have to agree with the [...]

My First Post Using Open Live Writer

Wed, 09 Dec 2015 22:51:00 GMT

I have been using Windows Live Writer for writing blog posts since 2008. It was kind of sad to see that active development stopped after the last release in 2012. So it was an early Christmas present for me when I read the announcement that Live Writer is now open source.

Open Live Writer is available for download on, the source code is hosted on GitHub.

UX-Vortrag von der NRW Conf 2015 als Video auf Channel 9

Sun, 29 Nov 2015 16:40:16 GMT

Mein Vortrag “Spaß, Verwirrung, Furcht und Basketball – User Experience unter Stress”, den ich auf der NRW Conf 2015 gehalten habe, ist nun als Video auf Channel 9 verfügbar.


Planning to Give a (Developer) Talk? Read this Article!

Sat, 31 Oct 2015 11:07:40 GMT

If you plan to speak at a conference or a user group meeting, “How To Deliver a Great Technical Presentation” by James Montemagno contains valuable tips.

The article contains virtually everything that I – from my personal experience of giving both technical (developer) and (a bit more “fluffy”) user experience talks – would recommend.

Some comments on just a few of the points he mentions:

  • Prepare that IDE – definitely; it always amazes me when speakers are “surprised” by the lower resolution of a projector.
  • Stop Using Dark Themes – oh yes, please!
  • Master Zooming – all my recent (UX) talks have been slide-only, but note to myself: This is something I should practice before my next developer talk.
  • Acquire the Right Equipment – …and make sure you always have batteries ready just in case your presenter device runs out of juice (or, when in doubt, replace the batteries before the talk). Regarding the bottle of water: I always bring my own water to avoid surprises (unexpected taste, lack of non-carbonated water at the venue)
  • Practice, practice and practice some more! –  I find it very helpful to actually stand up, even if I’m doing just a quick “voice in my head” walk-through.

Great article, highly recommended (and the people in the comments seem to agree).

UX-Vortrag auf der NRW Conf 2015

Sun, 13 Sep 2015 13:43:00 GMT

Am 8. und 9. Oktober 2015 findet in Wuppertal die NRW Conf 2015 statt, bei der ich in diesem Jahr als Sprecher dabei bin. Ich freue mich schon sehr auf dieses Community Event und vor allem darauf, mal mehr Zeit für spannende Gespräche mit den anderen Sprechern zu haben, als es sonst im Rahmen der dotnet Cologne (bei der ich als Mitveranstalter immer irgendwie unter Strom stehe) möglich ist.

Mein Vortrag trägt den Namen “Spaß, Verwirrung, Furcht und Basketball – User Experience unter Stress” und beschäftigt sich mit den Lehren aus Situationen, in denen ein eigentlich gut geschulter Anwender unter Stress plötzlich Probleme hatte, eine Software zu bedienen.

Konkret – und daher stammt das “Basketball” im Titel des Vortrags – geht es um eine Software für Video-Leinwände und LED-Werbebanden, die ich für den Basketball-Bundesligisten Telekom Baskets Bonn schreibe. Man möchte meinen, dass ich als Autor die Software in- und auswendig kennen sollte. Und doch spielen da unter dem Druck, vor 6000 Zuschauern möglichst nicht zu versagen, bei der Bedienung menschliche Faktoren eine große Rolle. Aus den wertvollen Erfahrungen habe ich eine Reihe von “Lessons learned” herausgepickt, die ich in dem Vortrag vorstelle. Und die im Kern relativ wenig mit Veranstaltungstechnik zu tun haben, sondern auch z.B. für Business-Anwendungen gelten.

Die Anmeldung zur NRW Conf ist mittlerweile offen, vielleicht sieht man sich dort?