---
title: "What is App.xaml file?"  
description: "What is App.xaml file?"  
author: "Anonymous User"  
published: 2011-03-11  
updated: 2020-09-14  
canonical: https://www.mindstick.com/interview/387/what-is-app-xaml-file  
category: "silverlight"  
tags: ["silverlight"]  
reading_time: 1 minute  

---

# What is App.xaml file?

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 Anonymous User

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/387/what-is-app-xaml-file

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