How to C# Create Login Form .Show Form2

Form to Form on C#
Source Code :
public Form1()
{
InitializeComponent();
}
Form2 for2 = new Form2();
private void button1_Click(object sender, EventArgs e)
{
if (textBox1.Text == "Ibrahim" && textBox2.Text == "1234")
{
for2.ShowDialog();
}
else
label3.Text = "UserName or Password incorect";
}
}