Imports System

'Testing simple and multi-level inheritence with all methods declared public

Public Class C1
     Public Function f1()As Integer
	Return 1
     End Function

    Public Function fn() As Integer
        Return 5
    End Function
End Class

Public Class C2
    Inherits C1
    Public Function f2()As Integer
        Return f1()
    End Function
End Class

Public Class c3
    Inherits C2
End Class

Module Inheritance
    Sub Main()

        Dim c1 As New C1()
        Dim a As Integer=c1.f1()
	If a<>1 Then
		Throw New Exception("#A1- Inheritence:Failed")
	End If

        Dim c2 As New C2()
        Dim b As Integer = c2.f1()
        Dim c As Integer = c2.f2()
        Dim d As Integer = c2.fn()

	If b<>1 Then
		 Throw New Exception("#A2- Inheritence:Failed")
	End If
	 If c<>1 Then
                 Throw New Exception("#A2- Inheritence:Failed")
        End If
	 If d<>5 Then
                 Throw New Exception("#A2- Inheritence:Failed")
        End If


        Dim c3 As New c3()
        b=c3.f1()
        c=c3.f2()
        d=c3.fn()

	If b<>1 Then
                 Throw New Exception("#A3- Inheritence:Failed")
        End If
         If c<>1 Then
                 Throw New Exception("#A3- Inheritence:Failed")
        End If
         If d<>5 Then
                 Throw New Exception("#A3- Inheritence:Failed")
        End If

    End Sub
End Module