c# - Unable to cast object of type 'Windows.UI.Xaml.Controls.Canvas' to type 'Canvas' -

i have canvas , want name when tapped. so, have xaml:

<canvas name="drawline" ... > ... </canvas> 

and function bind on tapped event:

private void changepage(object sender, tappedroutedeventargs e) {      string name = ((canvas)sender).name.tostring();      frame.navigate(typeof(params), name); } 

bug following error:

an exception of type 'system.invalidcastexception' occurred in gotqn.exe not handled in user code

additional information: unable cast object of type 'windows.ui.xaml.controls.canvas' type 'gotqn.canvas'.

why ((canvas)sender).name.tostring(); generating such error? there other way name?

it seems have 2 canvas classes in different namespaces. guess windows.ui.xaml.controls namespace not in using code assuming gotqn.canvas. did declare own canvas class? if yes, may have specify full name of canvas class want

string name = ((windows.ui.xaml.controls.canvas)sender).name.tostring();