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The name ‘MessageBox’ does not exist in the current context for Universal App

In the earlier versions of Windows Phone , we could use the MessageBox.Show method to display message box within the Windows Phone app .

When tried to use the same within the Universal App , you might get an error.

The name ‘MessageBox’ does not exist in the current context

This is because , the Universal App / Windows Phone 8.1 XAML App has the new API defines in the Windows.UI.Popups name space which provides the MessageDialog class to display the messagebox with in the Universal App.

How to display MessageBox in Universal Apps ?

var dialog1 = new MessageDialog("Test Message from Ginktage");
await dialog1.ShowAsync();

Senthil Kumar B
Senthil Kumar is a former Microsoft MVP (Most Valuable Professional). He is a Co-Author of the book "Windows 10 Development Recipes using JavaScript and CSS" for Apress Publication. He is a technical presenter, blogger, mentor and a Geek.  Senthil is a regular speaker is various local user groups. He has presented at conferences like Great Indian Developer Summit (GIDS) & Microsoft DevCamps. You can reach out to him via his Twitter handle @isenthil.