GUI CODES

Question

HI FRIENDS,
i am yuvraj persuing g niit course i am now doing  G U I (graphical user interphase) in this course
yesterday  when i was doing my work on window form i saw a code in my book to run a  audio file  on button click event after browse the file,but i am not get it  i copied all what that code but it's showing error so i want that if  anybody  please help me or let me know the right code.

                 THANK U
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