InnerException Error, Plz help..

Hi Everyone,
Can you plz resolve the error of this code...?

Imports System

Imports System.IO

 

Public Class TestInnerException

    Shared Sub Main()

        Try

            Try

                Throw New ArgumentException()

 

            Catch e As ArgumentException

                'make sure this path does not exist

                If File.Exists("\Bigsky\log.txt") = False Then

                    Throw New FileNotFoundException("File Not found when trying to write argument exception to the file", e)

                End If

            End Try

 

        Catch e As Exception

            Console.WriteLine([String].Concat(e.StackTrace, e.Message))

 

            If e.InnerException(Nothing) Then

                Console.WriteLine("Inner Exception")

                Console.WriteLine([String].Concat(e.InnerException.StackTrace, e.InnerException.Message))

            End If

        End Try

        Console.ReadLine()

    End Sub

End Class