private void button1_Click(object sender, EventArgs e)
{
textBox2.Text="";
String[] myDqq = textBox1.Lines;
for (int i=0;i<myDqq.Length;i++)
{
if (myDqq[i] != "")
{
textBox2.Text += myDqq[i] + "@qq.com" + "\r\n";
}
}
}