How to determine if a file is executable?

Question

I\'m writing a program that (part of what is does is) executes other programs. I want to to be able to run as many types of programs (written in different languages) as poss

Answer 1

if you are using .net than Process.Start do lot of things for you.

if you pass a exe , it will run the exe.

If you pass a word document , it will open the word document

and may more