Windows form Appilcation in c#

Hello everyone,

I'm new to C#. Can you tell me how to code for the following scenario in C#.

I have two forms (say Form1 & Form2). When I move from Form1 to Form2 on clicking botton1 in Form1, the Form1 should be closed or should not visible and when I close Form2 by clicking close(X) the red button on the right top of the form, the Form1 should be Visible or open?

Please help me and explain it

ThankYou.