Find Sum using Class

Public Class Class1
    Dim a, b As Integer
    Sub New()
        Console.Write("Enter 1st number : ")
        a = CInt(Console.ReadLine())
        Console.Write("Enter 2nd number : ")
        b = CInt(Console.ReadLine())
    End Sub
    Sub add()
        Dim c As Integer
        c = a + b
        Console.WriteLine()
        Console.WriteLine("Sum = " + c.ToString())
    End Sub
End Class


Module SumUsingClass
    Sub Main()
        Dim obj As New Class1
        obj.add()
        Console.ReadLine()
    End Sub
End Module