Finding odd or even number in VB.Net - different ways

Normally when most of the developers learn programming, they might have done the odd or even program. The basic idea is to divide by 2 and if the reminder is 0 the number is even else odd. Simple program is given below.

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        If (inputNumber Mod 2) = 1 Then
            Console.WriteLine("Odd")
        Else
            Console.WriteLine("Even")
        End If

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This is the normal behaviour of people who follows "do things after learning" principle. But what will happen if the person is following "learn by doing" principle. We can see a program like below

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Dim total As String = Convert.ToString(inputNumber / 2, Globalization.CultureInfo.InvariantCulture)
        If total.Contains(".") Then
            Console.WriteLine("Odd")
        Else
            Console.WriteLine("Even")
        End If

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Interesting. Isn't it? It works. But if we look at the performance,it is not good. This may not cause a big issue in today's machines whcih have 4 cores & 8GB ram but in terms of machine cycles its a considerable factor. Surprisingly this code came from a team who consist of 2 persons who are well reputed in their organization. They started their programming in career using .Net technology (as far as I know). This again enforces my view point about programmers.

As a serious programmer one should first learn how the hardware and software work together. 

Without that knowledge also they can create and deliver good looking web sites & desktop apps in managed technologies such as .Net or Java and flourish their career. But at a later point they will struck.