c# - WPF - Fire comboBox SelectedIndexChanged only from user click -

i want stop combobox_selectionchanged event being fired @ ui loading. should happen when user makes change in combo box.

to this, have written following in .xam.cs file.

  private void mycombobox_selectionchanged(object sender,   selectionchangedeventargs e)       {         combobox cb = (combobox)sender;         if (!cb.isfocused)         {             return;         }         else            viewmodel.onpropertychanged("myproperty");      } 

but not fire event when user makes change. have gone wrong ?

i know there similar question in stackoverflow. solutions in did not work me. pls help.

found solution. need combine selection_changed event previewmousedown event.

could selectionchanged event in wpf handled user interaction?