public void TestAppendAllLines() { var filename = Util.CreateNewFile(uncDirectory); try { File.AppendAllLines(filename, new[] { "test1", "test2" }); Assert.AreEqual("beginning of file" + Environment.NewLine + "test1" + Environment.NewLine + "test2" + Environment.NewLine, File.ReadAllText(filename)); } finally { File.Delete(filename); } }