I am having an error while executing this applicaiton

Hi Aruljothy,

I checked your code and found the error. It was because you are using namespace as File in code. Actually File is a namespace available with System.IO

So when you check File.Exists, it is actually checking inside your file class which should be rather using System.IO namespace. So I just changed the namespace & class name to Files. Attaching the code for same.