private void userListToolStripMenuItem_Click(object sender, EventArgs e)
{
UserInfoForm ui = new UserInfoForm();
ui.Dock = DockStyle.Fill;
this.panel1.Controls.Clear();
this.panel1.Controls.Add(ui);
ui.Show();
}
private void button2_Click(object sender, EventArgs e)
{
UserInfoForm ui = new UserInfoForm();
ui.Show();
}