fast scrolling in tablelay out panel

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C#

user-controls

I created one table layout panel custom control and for that control I used vertical scrolling.
Table layout has 1 row and seven columns.

I added some control in table layout panel. Now for fast scrolling, I used following code in onscroll event of the control.

this.VerticalScroll.Value = 48;

For scroll down it is working, but while scroll up it is not working means I am unable to scroll up. What to do? Thanks in advance.