c# - UserControl animation Cannot resolve TargetName -
i'm trying create simple animation in uwp user control, i'm running error cannot resolve targetname . code simple , feel overlooking obvious, can't figure out. xaml <usercontrol ... x:name="manipulationmediaviewercontrol" ... > <usercontrol.resources> <storyboard x:name="zoomanimation"> <doubleanimation duration="0:0:0.25" to="4" storyboard.targetproperty="(uielement.rendertransform).(compositetransform.scalex)" storyboard.targetname="viewboxhost" d:isoptimized="true"/> <doubleanimation duration="0:0:0.25" to="4" storyboard.targetproperty="(uielement.rendertransform).(compositetransform.scaley)" storyboard.targetname="viewboxhost" d:isoptimized="true"/> </storyboard> </usercontrol.resources> <grid> <viewbox x:name="vi...