asp.net - ChangePasswordQuestionAndAnswer Specified method is not supported -


i'm trying make website membership. works find execpt when member tries change password question , answer. found out problem on line :

bool changesucceeded = currentuser.changepasswordquestionandanswer(model.password, model.question, model.answer);

in call of changepasswordquestionandanswer. exception : specified method not supported. everytime try change question , answer. saw lot of things on web nothing have solved problem. here important parts in web.config

<add name="applicationservices" connectionstring="data source=localhost;initial catalog=isaacwebdb;integrated security=true" providername="system.data.sqlclient"/>  <membership defaultprovider="aspnetsqlmembershipprovider">       <providers>         <clear/>         <add name="aspnetsqlmembershipprovider" type="system.web.security.sqlmembershipprovider" connectionstringname="applicationservices"               enablepasswordretrieval="false" enablepasswordreset="true" requiresquestionandanswer="true" requiresuniqueemail="true"               maxinvalidpasswordattempts="5" minrequiredpasswordlength="6" minrequirednonalphanumericcharacters="0" passwordattemptwindow="10" applicationname="/"/>       </providers>     </membership>

does has idea wrong or missing thing need able this?

* edit : saw same thing happens membership.getallusers()

the documentation membershipuser.changepasswordquestionandanswer gives explanation why failing:

platformnotsupportedexception - method not available. can occur if application targets .net framework 4 client profile. prevent exception, override method, or change application target full version of .net framework.

it sounds targeting client profile .net framework 4 in project / solution.


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