a potentially dangerous request.form value was detected from the client in server
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i got an error from my web application which is got from my live site " a potentially dangerous request.form value was detected from the client in server" i am enable the ValidateRequest="false" in to the corresponding page and added the requestValidationMode="2.0" in the webconfig file and i am using the Html.encode and decode concept but still i got this error in my live site but this application works well in my localhost. let me know what i did wrongly. it will more helpfull for me,
Thanks in advance. 