Why is the main process hanging after closing the main form?

Question

C++ / C#

This is how I open a new form on the main form:

private void panel1_Click(object sender, EventArgs e)
        {
            Employees_Table employees_Table = new Employees_Table();
            employees_Table.StartPosition = FormStartPosition.Manual;
            employees_Table.Location = Location;
            employees_Table.Show();
            this.Hide();
        }

This is how I close the new form and show the main one again:

private void Employees_Table_FormClosed(object sender, FormClosedEventArgs e)
        {
            Main main = new Main();
            main.StartPosition = FormStartPosition.Manual;
            main.Location = Location;
            main.Show();          
        }

After that, the main form appears, after closing which the process remains hanging

Answer 1

Do you have two main forms MainForm? You don't have to do that.