public void Dep_prop_identification_performance()
{
var fw = new UserControl();
var l = fw.GetDependencyProperties().ToList();
new Action(()=>
{
for (int i = 0; i < 500; i++)
l = fw.GetDependencyProperties().ToList();
}).ExecutionTime().ShouldNotExceed(TimeSpan.FromMilliseconds(180));
Debug.WriteLine(l);
}