File Class and FileInfo Class

• FileInfo
  • Extends FileSystemInfo with file specific operations.
  • It is possible to create a FileInfo object for a non-existent file.
• File
  • Contains static methods allowing you to perform operations without a FileInfo instance.
  • Most methods perform atomic operations when writing and reading files.

FileInfo a = new FileInfo(@"\\davidcxp\Public\Hello.txt");
 
a.Encrypt();
// At this point, the file will be encrypted at NTFS level
// When you have colors enabled in Explorer, it'll be green.
 
a.Decrypt();

FileInfo a = new FileInfo(@"C:\Public\Hello.txt");
 
// Moves Hello.txt to OtherHello.txt and backs up OtherHello.txt to BackupHello.txt
// Hello.txt and OtherHello.txt has to exist.
// Replace performs a call to ReplaceFile in kernel32.dll in the background
a.Replace(@"C:\Public\OtherHello.txt", @"C:\Public\BackupHello.txt");

FileInfo a = new FileInfo(@"C:\Public\bla.txt");
Console.WriteLine(a.Exists);

File.WriteAllText(@"C:\Public\Test.txt", "Hello");     // Overwrites Test.txt if it exists
File.AppendAllText(@"C:\Public\Test.txt", " There!");  // Appends or creates Text.txt