Microsoft.Phone.Tasks namespace is not available

Question

Namespace Microsoft.Phone.Tasks is not available in XAML page code behind file of my Windows Phone application. Please see the screenshot.

In the properties windows of the project I see:

Target: Windows Phone 8.1

Am I missing an assembly reference or something?

Answer 1

Windows Phone 8.1 XAML apps don't have Microsoft.Phone.Tasks namespace to make common UI framework with windows Runtime APIs. Still you can code up a few tasks by using Windows.ApplicationModel namespace. As you havent claried which task you want to use, so here's the link to the whole MSDN article. http://code.msdn.microsoft.com/windowsapps/WindowsPhone-Store-81-vs-25c80c2a

Answer 2

From your Screenshot. I see your project is Windows Phone 8.1, not Windows Phone Silverlight 8.1 . Please see your Solution Explorer, is it Windows Phone 8.1? If so, there are not Microsoft.Phone.Tasks namespace anymore. If you want to choose picture, you should use FileOpenPicker.