get selected from listview

Question

I have a listview and i  added data using ListViewItem, i added tag text to all rows.

while (...)
                    {
                                           
                             ListViewItem item = new ListViewItem();
                             item.Tag = (Int64)data[0];
                             item.Text = (string)data[1];
                             item.SubItems.Add((string)data[2]);
                          
                             list.Items.Add(item);   
                        
                    }                   

Now i have a button the needs to remove items data form listview, but the problem is how to get tag values of selected rows ?