How do I add padding, or some space between the textboxes when using dockstyle.top property?

for(int i =0; i< 10; i++) {
    textboxes[i] = new TextBox();
    textboxes[i].Dock = DockStyle.Top;
    mypanel.Controls.Add(textboxes[i]); 
}

The code above puts textboxes right beneath each other. Can't figure this out without using mass panels or fixed positioning. How to do the following?

1) I would like to add around 10-20pixels between boxes.

2) How to change size (height,width) of the textboxes, since when using dockstyle.top it ignores the size commands ?

c# winforms padding
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