列表框中没有扩展名的文件

Question

1。）如何删除文件扩展名（“ .txt”）？ 2.）为什么当我单击列表框窗口的某个位置以便复制所有项目时？???

private void listBox1_SelectedIndexChanged_1(object sender, EventArgs e)
        {
            DirectoryInfo dinfo = new DirectoryInfo(@"C:\Folder");
            FileInfo[] Files = dinfo.GetFiles("*.txt");
            foreach (FileInfo file in Files)
            {
                listBox1.Items.Add(file.Name);
            }
        }

Answer 1

listBox.Items.Clear(); // to clear current listbox items
FileInfo[] Files = dinfo.GetFiles("*.txt");
foreach (FileInfo file in Files)
{
     listBox1.Items.Add(Path.GetFileNameWithoutExtension(file.Name));
}