public void DirectoryNotExists()
{
Assert.ThrowsExact <ArgumentNullException>(() => Assert.DirectoryNotExists(null as string));
Assert.ThrowsExact <ArgumentNullException>(() => Assert.DirectoryNotExists(null as DirectoryInfo));
Assert.DoesNotThrow(() => Assert.DirectoryNotExists(NonExistingDirectory));
Assert.DoesNotThrow(() => Assert.DirectoryNotExists(NonExistingDirectoryInfo));
Assert.DoesNotThrow(() => Assert.DirectoryNotExists(new DirectoryInfo(NonExistingDirectory)));
Assert.ThrowsExact <AssertionException>(() => Assert.DirectoryNotExists(ExistingDirectory));
Assert.ThrowsExact <AssertionException>(() => Assert.DirectoryNotExists(ExistingDirectoryInfo));
}