Maintain local variable value between calls in vb.net

Public Function MethodOne(ByVal s As String) As String

    Dim sb As New StringBuilder()

    sb.Append(s)
    sb.Append(MethodTwo())

    return sb.ToString()

End Function

Public Function MethodTwo() As String

    Dim i As Integer = 0

    For index As Integer = 0 To 5
        i = index
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    return i.ToString()

End Function

I want to retain the value of i, but once it goes back into MethodOne, it loses its value. I tried making it static i As integer = 0, but this did not work.

sorry misread that. How about creating a property called Count, and update it whenever MethodTwo is called. You can use the Property Count in MethodTwo instead of i.

Public Function MethodOne(ByVal s As String) As String

    Dim sb As New StringBuilder()

    sb.Append(s)
    sb.Append(MethodTwo())

    return sb.ToString()

End Function

Public Property Count As Integer
'Count will be zero when initialized

Public Function MethodTwo() As String

    'Dim i As Integer = 0

    For index As Integer = 0 To 5
        Count = Count + index
    Next

    return Count.ToString()

End Function

Consider this example which is a bit different than yours (adds 5 to i instead of setting a value of 5)

Public Function MethodOne(ByVal s As String) As String

    Dim sb As New StringBuilder()

    sb.Append(s)
    sb.Append(MethodTwo())

    return sb.ToString()

End Function

Public Function MethodTwo() As String

    Static i As Integer = 0

    i+=5

    return i.ToString()

End Function

Now, on the first run i will be set to its static value, which is 0. It will be incremented by 5, so the value will be 5. On the second one, the value of i is still 5, and it will be incremented by 5. The new value will be 10.

In your example, i was always set to 5, so it didn't change anything if you retained the value or not.

Edit after question changed:

What you want to do is have a class member, not a method variable. If the value is still 0 once the method has run, then there are two possible reasons for this. Either:

1. The variable is never set (AgeQualifyingCode is never 8 or 10)
2. The variable is set to 0 inside the method.

You can find out what is happening with some debugging with breakpoints.