There is a Web Form and its in have TextBoxes and TextBoxes stars with txt

I want to these textboxes with For Each clear and so my code

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Sub Clear()
For Each Ctrl As Control In Page.Controls
If TypeOf (Ctrl) Is TextBox Then
If Ctrl.ID.StartsWith("txt") Then
CType(Ctrl, TextBox).Text = ""
End If
End If
Next
End Sub

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Thanks For Help