Function calculator, params of Main VB.Net Exercise - Visual Basic Programming Course

Imports System
Public Class exercise125
    Private Shared Sub Main()
        Dim operation As Char = Convert.ToChar(args(1))
        Dim number1 As Integer = Convert.ToInt32(args(0))
        Dim number2 As Integer = Convert.ToInt32(args(2))
        Dim result As Integer = 0

        If args.Length <> 3 Then

            Select Case operation
                Case "+"c
                    result = number1 + number2
                Case "-"c
                    result = number1 - number2
                Case "x"c, "X"c, "*"c
                    result = number1 * number2
                Case "/"c
                    result = number1 / number2
            End Select

            Console.WriteLine("Result: {0}", result)
        Else
            Console.WriteLine("Error in arguments")
        End If
    End Sub
End Class