I wanted to read input equation by user A+B and assign input user value to A and B to ask them to add and give answer. But I just can't get the code to work. I using VS2005 and VB.Net. Can help me with my code:

```
Dim A As Double
Dim B As Double
'// Use the String.Split method to seperate the part before the + and after.
Dim equation As String() = textbox3.Text.Split(CChar("+"))
'// Equation will now contain 2 elements. Convert them both to doubles and put the first element in A and the 2nd (last) in B.
A = Convert.ToDouble(equation(0))
B = Convert.ToDouble(equation(1))
MsgBox("Answer = " & A + B)
```