c# - WPF InkCanvas - can't change color -

this absolutely ridiculous! i'm trying change color of inkcanvas through code doesn't work. saw lot of tutorials , don't work me. though they're straightforward. i'm new wpf still - should no-brainer.

*note: can set color through xaml that's one-time operation , not want.

my code:

using system.windows; using system.windows.controls; using system.windows.ink; using system.windows.media;  namespace wpfapplication1 {     public partial class mainwindow : window     {         inkcanvas inkcanvas = new inkcanvas();          public mainwindow()         {             initializecomponent();             this.loaded += new routedeventhandler(setcolor);         }          // doesn't work         private void setcolor(object sender, routedeventargs e)         {             inkcanvas.defaultdrawingattributes.color = colors.red;         }          // doesn't work either         private void button_click(object sender, routedeventargs e)         {             inkattributes.color = colors.blue;         }     } } 

edit: xaml was:

<window... < inkcanvas name="inkcanvas" /> .... 

in code sample, define inkcanvas in window's code-behind, don't add window's visual controls.

if either specify canvas using xaml:

<window x:class="..."         ...>     <inkcanvas x:name="inkcanvas"/> </window> 

or define in c# , add window:

inkcanvas inkcanvas = new inkcanvas();  public mainwindow() {     initializecomponent();     this.loaded += (sender, args) =>     {         this.addchild(inkcanvas);     }; } 

then line inkcanvas.defaultdrawingattributes.color = colors.red; shold work.