Dateiinfos auslesen

using System.IO;

FileInfo fiFile = new FileInfo("c:\\Test1.jpg");

string sExt = fiFile.Extension;            // .jpg
string sFileName = fiFile.FullName;        // c:\\Test1.jpg
string sg = fiFile.DirectoryName;          // c:\\
long iSize = fiFile.Length;
DateTime dtCreation = fiFile.CreationTime; // Zeit