umbraco7 - Perform Action When property changes - Umbraco Events v7 -

when user saves given doc type want check property value, if has changed original value want perform action.

any ideas?

i know how use events, need syntax... heres mean.

void contentservice_saving(icontentservice sender, umbraco.core.events.saveeventargs<icontent> e) {     foreach (var mynode in e.savedentities.where(x => x.hasproperty("propertyname")))     {          //if (mynode.getpropertyvalue("propertyname").haschanged) // //bla bla bla      } } 

also there version of method single icontent object rather list, in previous versions not case?

this answer looking for..................... why there no documentation on method :-/

void contentservice_saving(icontentservice sender, umbraco.core.events.saveeventargs<icontent> e) {  foreach (var mynode in e.savedentities.where(x => x.hasproperty("myproperty")))     {                 if (mynode.ispropertydirty("packagestatus"))                 {                            //perform action                 }     }