Working with arrays of Windows form elements

What I have:

label4.Show();
label5.Show();
pictureBox3.Show();
textBox1.Show();
button3.Show();

What I need (example, but doesn't work):

Object[] arr = new Object[] { label4,label5,pictureBox3,textBox1,button3 };
foreach (Object o in arr)
{
    o.Show();
}

Is it to possible to do something like this code?