private void btnLogout_Click(object sender, EventArgs e)
{
localhost.Service1 ser = new localhost.Service1();
bool TeacherLogoutResult;
bool TeacherLogoutResultSpecified;
ser.TeacherLogout(out TeacherLogoutResult, out TeacherLogoutResultSpecified);
if (TeacherLogoutResult)
{
TeacherLoginform frm = new TeacherLoginform();
this.Hide();
frm.Show();
}
else
{
}
}