Drag adorner thumb through code behind C# .NET WPF

http://miteshsureja.blogspot.com/2016/08/adorners-in-wpf.html?m=1#:~:text=See%20below%20example%20which%20uses,select%2Fresize%20UIElement%20on%20canvas.&text=%3CButton%20Height%3D%2250%22,Content%3D%22Click%20Me!%22&text=As%20you%20can%20see%20in,corners%20will%20appear%20to%20control.    This is the article from where i learn to draw adorner layer on the top of any control or shape. Here i want to do when i click on canvas it create new shape with adorner... which is running perfectly... what is want when i click on canvas and drag through mouse it resize the control.. all this happen in single mouse down and up cycle right now its happening but requires two mouse click.. one for creating the control other to resize it. Is there any way to call dragdelta of bottomright automatically after creating the control

http://miteshsureja.blogspot.com/2016/08/adorners-in-wpf.html?m=1#:~:text=See%20below%20example%20which%20uses,select%2Fresize%20UIElement%20on%20canvas.&text=%3CButton%20Height%3D%2250%22,Content%3D%22Click%20Me!%22&text=As%20you%20can%20see%20in,corners%20will%20appear%20to%20control.