How can I create a controls with the for loop?

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C#

WinForms

create controls dynamically with a loop in windows forms.

What I have tried:

I have tried to write code to make that with a list of controls, but it hasn't been working yet
groupBox show only one label after the loop

List<Label> labels = new List<Label>();
           for (int i = 0; i < 8; i++)
           {
               labels.Add(new Label());
               labels[i].Location = new Point(6 + i, 26 + i);
               labels[i].Text = "test";
               labels[i].Size = new Size(70, 40);
               groupBox3.Controls.Add(labels[i]);
           }