Introduction - If you have any usage issues, please Google them yourself
private void frmchat_FormClosing(object sender, FormClosingEventArgs e)
{
foreach (frmchat frm in onlinechatfrm.onlinefrm)
{
if (frm.name == this.name)
{
onlinechatfrm.onlinefrm.Remove(this)
break
}
}
}