Windows Forms Application - Error creating window handle

Code in Form1.cs: In which, I hid Form1.cs then showed Form2.cs

private void Form1_Load(object sender, EventArgs e)
{
    this.Hide(); 
    Form2 f2 = new Form2();
    f2.Show();
}

Code in Form2.cs: In which, I hid Form2.cs and tried to show Form1.cs again then the Error creating window handle appeared on runtime.

private void Form2_Load(object sender, EventArgs e)
{
    this.Hide();
    Form1 f1 = new Form1();
    f1.Show();
}