Retrieve string GET_HARDWAREID to Richtextbox or Textbox instead of Console

Question

C# DESKTOP APPLICATION
I am trying to get string GET_HARDWAREID in Richtextbox or Textbox instead of Console.WriteLine(hwid) as you can see in Code.
What will be the code for it?
I tried many changes from stackoverflow solutions did not worked any of it wasted more than 36hrs.
Please help me code this!
Source code video tutorial:
https://youtu.be/qmZBHzM0EKY
https://code.sololearn.com/c4yrVwKQWLKL/?ref=app
https://code.sololearn.com/cLJUOXUAHkbF/?ref=app

Answer 1

Tried that already it doesn't retrieve anything 🙁

Update:
it was working all the time, i had to pass ENTER to load the contents of textbox
private void button_Click(object sender, EventArgs e)
{
textBox1.Focus();
SendKeys.Send("{ENTER}");
}

Answer 2

textBox1.Text = HUID.GET_HARDWAREID;

I assume you have a winforms application for your textboxes.

https://www.c-sharpcorner.com/article/working-with-textbox-control-in-windows-forms-application-using-visual-stuudio-2/#:~:text=WinForms%20TextBox%20controls%20are%20used,the%20size%20of%20the%20control.

What is it that is not working?