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Create a FileInfo
A FileInfo object is created using the default constructor that takes a string as a file name with a full path.
string fileName = @"C:fileName.txt"; FileInfo fi = new FileInfo(fileName);
Here is a complete sample with FileInfo class
// Full file name string fileName = @"C:fileName.txt"; FileInfo fi = new FileInfo(fileName); // Create a new file using (FileStream fs = fi.Create()) { Byte[] txt = new UTF8Encoding(true).GetBytes("New file."); fs.Write(txt, 0, txt.Length); Byte[] author = new UTF8Encoding(true).GetBytes("Author CsharpCanBan.Com"); fs.Write(author, 0, author.Length); } // Get File Name string justFileName = fi.Name; Console.WriteLine("File Name: {0}", justFileName); // Get file name with full path string fullFileName = fi.FullName; Console.WriteLine("File Name: {0}", fullFileName); // Get file extension string extn = fi.Extension; Console.WriteLine("File Extension: {0}", extn); // Get directory name string directoryName = fi.DirectoryName; Console.WriteLine("Directory Name: {0}", directoryName); // File Exists ? bool exists = fi.Exists; Console.WriteLine("File Exists: {0}", exists); if (fi.Exists) { // Get file size long size = fi.Length; Console.WriteLine("File Size in Bytes: {0}", size); // File ReadOnly ? bool IsReadOnly = fi.IsReadOnly; Console.WriteLine("Is ReadOnly: {0}", IsReadOnly); // Creation, last access, and last write time DateTime creationTime = fi.CreationTime; Console.WriteLine("Creation time: {0}", creationTime); DateTime accessTime = fi.LastAccessTime; Console.WriteLine("Last access time: {0}", accessTime); DateTime updatedTime = fi.LastWriteTime; Console.WriteLine("Last write time: {0}", updatedTime); }