Is if(items != null) superfluous before foreach(T item in items)?

Question

I often come across code like the following:

if ( items != null)
{
   foreach(T item in items)
   {
        //...
   }
}

Basically, the

Answer 1

You could always test it out with a null list... but this is what I found on the msdn website

foreach-statement:
    foreach   (   type   identifier   in   expression   )   embedded-statement 

If expression has the value null, a System.NullReferenceException is thrown.