Using Tab control how to write text box value carry from one form to another form in windows form c#

Suppose there are two independent forms: Form1 and Form2

and in Form1, you want to show another Form "Form2" on some button click...

On Button Click Event of Form1, you need to write as:

I don't think, it would be a problem.

Form2 frm2 = new Form2();            
frm2.Controls["textBox1"].Text = "From Form 1";            
frm2.Show();