What is DesignInstance in XAML

Question

I actually study the MVVM pattern and found this in a lesson:

d:DataContext="{d:DesignInstance step1:ViewModel}">

I know that I use a data context to bind data, but I don’t understand what DesignInstance is useful for and why I write it there?

On MSDN HP is: "DesignInstance is a design-time property." But there is nothing I can do about it.

Change: step 1 from the tutorial at http://www.learnmvvm.com/tutorial.html#step1-1

Answer 1

A project instance is used when a view is opened in the visual studio editor.

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Answer 2

, Cariburn, , , XAML , Visual Studio XAML , , , . DesignInstance .