I have to access a file from another system with in a network from c# web project. I have no problem in accessing the file when i run the project under default website with localhost. but i couldn't access the file when the project is made to use local iis web server, Is exists property of file info class is returning false and all other properties like isreadonly etc are returning SytemUnauthorized access. All the system in the network use windows 2008 server. Can any one help me?