Print PDF files from a directory.

Hi,

I want to write an application that 
1.) Runs in the background and checks a particular directory. 
Should I create a windows service or a console application or something else? What is the best approach to create background applications?

2.) If a pdf file is found in that directory then print the file and then delete it. Also, I don't want pdf file to open before printing.

Please let me know how to proceed?

Thanks

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Kunal G