How to make administrator class to control menu

Here's a simple example

namespace UserMenu
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
checkBox1.Checked = true;
disableButts();
}

public void disableButts()
{
bttn1.Enabled = false;
bttn2.Enabled = false;
bttn3.Enabled = false;
bttn4.Enabled = false;
bttn5.Enabled = false;
}

private void bttnCancel_Click(object sender, EventArgs e)
{
disableButts();
textBox1.Text = "";
textBox2.Text = "";
}

private void bttnOK_Click(object sender, EventArgs e)
{
if (textBox1.Text=="hello" && textBox2.Text=="world")
{
bttn1.Enabled = true;
bttn2.Enabled = false;
bttn3.Enabled = false;
bttn4.Enabled = true;
bttn5.Enabled = false;
}
else if (textBox1.Text == "ken" && textBox2.Text == "password")
{
bttn1.Enabled = false;
bttn2.Enabled = true;
bttn3.Enabled = false;
bttn4.Enabled = false;
bttn5.Enabled = true;
}
else
{
MessageBox.Show("Incorrect name and/or password");
}
}

private void bttnLogOff_Click(object sender, EventArgs e)
{
disableButts();
textBox1.Text = "";
textBox2.Text = "";
}

private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
textBox2.PasswordChar = '*';
}
else
{
textBox2.PasswordChar = '\0';
}

}


}
}
Buttons 1 to 5 are your menu -you will need to store your passwords/usernames securely