I get an error 'A potentially dangerous Request.Form value was detected from the client ' when I hit submit on my ASP.NET Webform. What can I do?

This error is caused by a newly introduced feature of .NET Framework 1.1, called "Request Validation."  This feature is designed to help prevent script-injection attacks whereby client script code or HTML is unknowingly submitted to a server, stored, and then presented to other users.

To resolve the problem, you can either : 

  1. Disable Request Validation in the web.config file
  2. Disable Request Validation in the Page itself by setting attribute validateRequest=false in Page Directive.
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