How to find files in directory using c#?

Getting a file path :

// This will give the complete path to the folder name  ( ~ File)such as 

//C:\Users\Kumarg\Documents\Visual Studio 2010\Projects\Tag_Cloud\Tag_Cloud\File

string path = Server.MapPath(" ~/folderName");   

Getting all files path under a folder or directory : 

string [ ] fileList = new  string[20];
fileList = Directory.GetFiles(Server.MapPath("~/folderName"));

Getting only file name without the path under a folder or directory 

  var UploadedFile = Directory.GetFiles(Server.MapPath("~/folderName")).Select(f => Path.GetFileName(f));