如果您更喜欢命令式方法，也可以这样做.
C#

You could also do this if you prefer a less imperative approach.

C#

(from object item in listBox2.Items
 where !listBox1.Items.Contains(item)
 select item).ToList().ForEach(x=>listBox2.Items.Remove(x));

VB

VB

(From item In listBox2.Items Where Not listBox1.Items.Contains(item)item).ToList().ForEach(Function(x) listBox2.Items.Remove(x))

尝试一下

try this

for (int i = 0; i <listBox2.Items.Count ; i++)
         {
             object item = listBox2.Items[i];
             if (!listBox1.Items.Contains(item))
             {
                 listBox2.Items.Remove(item);
                 i--;
             }
         }