About form closing at runtime in C#

Question

I have two forms named frmRegistration & frmMain in my project in c#.

I have set frmRegistration as my start form.
User enters data in the frmRegistration form & presses submit button to get registered. Then, I want to close frmRegistration form & show frmMain form to the user.
I'm trying this by using Dispose() method of the frmRegistration. But, when I use this method, it disposes all my application execution because frmRegistration is the startup form.

I don't want this to happen. Can anyone solve this problem?

thanks.

Answer 1

Use Show() and Hide() methods.

    private void btnSubmit_Click(object sender, EventArgs e)
    {
      ...
      var frm = new frmMain();
      frm.Location = this.Location;
      frm.StartPosition = FormStartPosition.Manual;
      frm.Show();
      this.Hide();
    }  

UPDATE:
If you don't want to have frmRegistration in memory, start your program in main form and add this in your MainForm's Shown event:

    var frm = new frmRegistration();
    frm.Location = this.Location;
    frm.StartPosition = FormStartPosition.Manual;
    frm.FormClosing += delegate { this.Show(); };
    frm.Show();
    this.Hide();  

Now you can just close the registration form and automatically get back to main form.