c# - Button click not working -

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i have web application in multi language .

in application have web page contains text box book name,and button update book name database.

when text box contains dutch words button not getting clicked. it's working fine english words.

dutch words like: grün und für gebäuden behagliche, angenehm warme oder kühle bedingungen.

error message upon button click:

i'm getting following exception on button :microsoft jscript runtime error: sys.webforms.pagerequestmanagerservererrorexception: unknown error occurred while processing request on server. status code returned server was: 500

try put autopostback property true. once have faced such type of situation, have made autopostback true , ran finally.


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