Hello embedded community 
I have a problem with Debugging Arduino Code 
.
I am writing my code using Atmel studio tool chain and flashing
the generated hex file into Arduino board using Xloader. The question is,
How could i debug that code using Atmel debugger?
B.R
since you managed to install atmel studio did you not also install the help file on debugging ?
You have to make a hardware modification to most arduino boards to get debugging to work, because the auto-reset functionality interferes with debug communications. Also, you DO need external debugging hardware.
Easiest solution: get an Atmel ATmega328P Xplained Mini development board, which has an on-board debugger chip.