---
title: "What is App.Xaml?"  
description: "What is App.Xaml?"  
author: "Amit Singh"  
published: 2011-03-17  
updated: 2020-09-18  
canonical: https://www.mindstick.com/interview/424/what-is-app-xaml  
category: "silverlight"  
tags: ["silverlight"]  
reading_time: 1 minute  

---

# What is App.Xaml?

It is a file used in WPF/SilverLight applications. \
Its settings affect the different .xaml pages. It is used for these reasons :\
\
1) Provides a startup URI in WPF or specify the startup page in SilverLight applications \
\
2)Define event handlers like Application_Error, Application_Startup wherever needed. \
\
3)Define global styles inside the resources tag \
\
4)Define properties that can then be used for data passing between .xaml pages.

## Answers

### Answer by Amit Singh

It is a file used in WPF/SilverLight applications. \
Its settings affect the different .xaml pages. It is used for these reasons :\
\
1) Provides a startup URI in WPF or specify the startup page in SilverLight applications \
\
2)Define event handlers like Application_Error, Application_Startup wherever needed. \
\
3)Define global styles inside the resources tag \
\
4)Define properties that can then be used for data passing between .xaml pages.


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Original Source: https://www.mindstick.com/interview/424/what-is-app-xaml

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