How can I navigate between forms

I am a newbiest in c# and window form i am doing a project and i meet some problem

1. how can i navigate forms within the window( i have a menu strip, when click it will show a item "Brand", so when i click it, it should open up within the window , i don't want something using the mdiparent/container, i have form1 and form2, then i put the menu strip in form1, which there is some thing inside form1, if use the mdiparent/container, the form1 content/thing will block the form2 )

2.i use the below code and the problem is i want to close the form1 which i click on " Brand" in the menu strip...but how???

public partial class Form1 : Form
{
    //  i put the menu strip in form1 design
    public Form1()
    {
        InitializeComponent();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
    }

    private void Check_Click(object sender, EventArgs e)
    {
        Form2 Check = new Form2();
        Check.Show();
    }
}