public void Replace3()
{
string tempFile = Path.Combine(Path.GetTempPath(), "OriginalFile.txt");
string tempFile2 = Path.Combine(Path.GetTempPath(), "NewFile.txt");
string backupFile = Path.Combine(Path.GetTempPath(), "OriginalFileBackup.txt");
string expected = "This is a test.";
File.Delete(tempFile);
File.Delete(tempFile2);
File.Delete(backupFile);
File.AppendAllText(tempFile, expected);
File.AppendAllText(tempFile2, String.Empty);
// Move the contents of tempFile into tempFile2
ExtendedFileInfo efi = new ExtendedFileInfo(tempFile);
efi.Replace(tempFile2, backupFile, true);
Assert.IsTrue(File.Exists(backupFile));
Assert.IsTrue(File.Exists(tempFile2));
string actual = File.ReadAllText(tempFile2);
Assert.AreEqual(expected, actual);
}