i have a page in that one drop down List.when i changed the value(abc to sam's) i am getting below error
sys.webforms.pagerequestManagerParserErrorException:This message received from the server could not be parsed.Common causes for this error are when the response is modified by calls to Response.Write(),response filters,HTTPModules,or server trace is enabled.
Details:Error Parsing near'
<!DOCTYPE html P'
can you suggest me where i have trace this issue