VB.NET ช่วยแก้ Code จาก For Next เป็น Do While ผมทำแม่สูตรคูณ

Dim num,i,total As Integer

do
     total = num * i

i++

Loop While (i<=12)

Dim count1 As Integer
Dim count2 As Integer
count1 = 1
count2 = 1

do while count1 <= 2
   count2 = 1
       do while count2 <= 12
	List1.AddItem count1 & " x " & count2 & " = " & count1 * count2
	count2 = count2 + 1
	loop
   count1 = count1 + 1
loop