Category Archives: Essentials

Covid, False Positives & Bayesian Probability

This is a repost from 2009. It talks about breast cancer, but applies equally well to Covid testing, given the high percentage of false positives (not to mention the more worrisome false negatives). We simply are not wired well for … Continue reading

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New site for my writing

I’ve created a site for my non-technical writing. Check it out.

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MonkeyCache step by step

The amazing James Montemagno of Xamarin/Microsoft has done it again. He has created an incredibly simple cache, named MonkeyCache, that you can get up and running very quickly. In this post I will walk through setting up and using the … Continue reading

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DataTemplateSelector

Suppose you have a collection of items and you want to display them in a ListView (Xamarin.Forms). The catch is that you want to change the display of each item depending on its state or some other code-based attributes. At … Continue reading

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C# 9 Part 3 – Patterns

Jared Parsons – lead of the C# Compiler Team at Microsoft C# 9 Roadmap Jared – LinkedIn Welcome to C# 9

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An Alert From the ViewModel

Quite often we want to send an alert from the view model, but you can only do so from the view. We’ve tackled this problem in the past but we think there is room for a simplified and clear step … Continue reading

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Code Snippet – By request

Code Snippets can save you from repetitive (boring) tasks. Visual Studio comes with a great many code snippets, perhaps the most often used is ctor which creates an empty constructor. You can also create your own. Here is one I … Continue reading

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Picker within Listview

We needed to put a picker inside a list view in a Xamarin.Forms app, but we wanted to be notified when one of the pickers changed and be able to get the value from the picker (and know which one … Continue reading

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Xamarin.Forms Shell

Focus on Xamarin.Forms Shell – the new way to create great Xamarin.Forms applications. We go in-depth with Shane Neuville, a Senior Developer on the Xamarin.Forms team. Shell Forms IntroductionProject BoardXaminalsXappyShell Login SampleGastropods

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Mark Price – C# & .NET Core

Mark Price, author of C# 8 and .NET Core 3.0 Modern Cross Platform Development talks about… well about everything .NET A fantastic exploration of what is new in C#, .NET Core, Blazor, and much more,

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Xamarin Coding Standards

There are many best practices in writing Xamarin. Here are some that we’ve canonized where I work… 👍 By convention the identifier for the ViewModel is vm 😠 Do not assign more than one page to a view model. Generally … Continue reading

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Shawn Wildermuth

Shawn Wildermuth has been tinkering with computers and software since he got a Vic-20 back in the early ‘80s. As a Microsoft MVP since 2003, he’s also involved with Microsoft as an ASP.NET Insider and ClientDev Insider. You may have … Continue reading

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