Recently one of our customers had an issue when migrating from ASP.NET 1.1 to ASP.NET 2.0. The issue came up particularly in the deployment server where any page that had validations raised the error ?Webform_PostBackOptions? is undefined. If you had worked with ASP.NET 1.1 you would recollect there was an aspnet_client folder that contains all the scripts that help in client side validation as well as raising the postback events. In ASP.NET 2.0, the ?WebResource.axd? file is the handler that generates all the client side scripts which were earlier processed by the aspnet_client folder. Coming back to this particular customer scenario, they were running URL Scan utility on their server http://learn.iis.net/page.aspx/473/using-urlscan URL Scan...(read more) ...
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