asp.net - PageRequestManagerServerErrorException, typing xml inside a textArea control on C# -

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i'm trying have xml text (actually <? breaks already) inside textarea show user, not edit. looks on postback press save button save other control values, on browser console:

uncaught sys.webforms.pagerequestmanagerservererrorexception:  sys.webforms.pagerequestmanagerservererrorexception: unknown error @ processing... response: 500

the code never reaches load of page postback, don't think it's not error on code.

i tried add

validaterequest="false"

in <%@ page directive didn't work out.

is there way show user xml text without having postback blow away?


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