private void annotation_Click(object sender, RoutedEventArgs e)
{
ExceptionFriendly(() =>
{
_context.SendingRequest2 += (requestSender, eventArgs) =>
{
eventArgs.RequestMessage.SetHeader("Prefer", "odata.include-annotations=\"*\"");
};
var people = WaitForResult(_context.People.ExecuteAsync());
var person = people.Single(p => p.UserName == "russellwhyte");
string annotationValue;
if (_context.TryGetAnnotation(person, "TestAnnotation", "TestQualifier", out annotationValue))
{
SetText($"Annotation on People('russellwhyte') is '{annotationValue}'.");
}
else
{
SetText("No annotation on People('russellwhyte').");
}
});
}