if (this.listView1.SelectedItems.Count > 0)
            {
                foreach (ListViewItem item in this.listView1.SelectedItems)
                {
                    this.listView1.Items.Remove(item);
                }
            }

------解决方案--------------------

前面加一个不为空的判断
C# code
 if (this.listView1.SelectedItems!=null && this.listView1.SelectedItems.Count > 0)
            {
                foreach (ListViewItem item in this.listView1.SelectedItems)
                {
                    this.listView1.Items.Remove(item);
                }
            }