How To Sort Items By Left Right Top Bottom I C# Wpf

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C#

WPF

Hi All, I have wpf project which display info of buttons on canvas by position as following:
my canvas:
--------------------------------------
|-----btnA----------btnC-------btnD |
|--btnB-----------btnF---------------|
|--------btnE-----------btnG---------|
|---------------------------------------|
|btnH----------btnI------------------|
|---------------------------btnJ-----|
--------------------------------------

I want to save name info of buttons on canvas to list same as:
btnA, btnC, btnD, btnB, btnF, btnE, btnG, btnH, btnI, btnJ.

How to get button on canvas and sort them to have list button name same as above?

Please help me.

Thanks in advance!