public void GetQuestionnaireAsync(Action <IOperationResult <Questionnaire> > callback)
{
IAsyncResult asyncResult = this.service.BeginGetQuestionnaire(
(ar) =>
{
OperationResult <Questionnaire> operationResult = new OperationResult <Questionnaire>();
try
{
operationResult.Result = service.EndGetQuestionnaire(ar);
}
catch (Exception ex)
{
operationResult.Error = ex;
}
synchronizationContext.Post(
(state) =>
{
callback(operationResult);
},
null);
},
null);
}