While testing your Web app in a nonproduction environment, you want the browser output of all of the app’s ASPX pages to include helpful messages concerning when certain page events such as Load, Render, and PreRender occur and how long they take to execute. You’d also like to see the contents of all server variables. What is the simplest way to achieve this without having to code such messages on every page?

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Create your own class that inherits from System.Web.UI.Page and put in code to use Response.Write to send helpful messages and server variable contents to the browser in the Load, Render, and PreRender events. Then, temporarily change all of your page cla

Put Trace=True in the @Page directive at the top of all of your ASPX files.

In the Web app’s config file, include <trace value=”true” allPages=”true”/> in the <system.web> element.

In the Web app’s config file, include <trace level=”page”> in the <system.web> element, and then, within the <trace> element, put <page name=”...”/> elements to indicate the list of pages that should include these trace messages.

In the Web app’s config file, include <trace enabled=”true” pageOutput=”true”/> in the <system.web> element.

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