Cant open a closed file - asp.net

Question

I am using the code below to try and open a pdf file and I am getting the error cannot open a closed file? Not sure what I am missing here.
Dim FileName As String
Dim FolderLocation As String = Nothing
Dim FileFormat As String = "application/pdf"
Dim tFileNameArray As Array = Nothing
Dim tFileName As String = Nothing
FileName = "\\Server\Files\45144584.pdf"
Dim fs As New FileStream(FileName, FileMode.Open, FileAccess.Read)
Using (fs)
End Using
Dim data() As Byte = New Byte(fs.Length) {}
Dim br As BinaryReader = New BinaryReader(fs)
br.Read(data, 0, data.Length)
br.Close()
Response.Clear()
Response.ContentType = FileFormat
Response.AppendHeader("Content-Disposition", "attachment; filename=" & tFileName.Split("\")(tFileName.Split("\").Length - 1))
Response.BufferOutput = True
Response.BinaryWrite(data)
Response.End()

Answer 1

You need to have all code that references fs inside of the using, otherwise you are attempting to access an object that has already been disposed. I would also do the same thing with the BinaryReader, since it also implements IDisposable:
Dim data() As Byte
Using fs As New FileStream(FileName, FileMode.Open, FileAccess.Read)
data = New Byte(fs.Length) {}
Using br As New BinaryReader(fs)
br.Read(data, 0, data.Length)
End Using
End Using
...

Answer 2

You have the following lines:
Using (fs)
End Using
After End Using, the file is closed and the fs object disposed of.
You need to put the code that reads from fs inside the using block.

Answer 3

Dim fs As New FileStream(FileName, FileMode.Open, FileAccess.Read)
Using (fs)
End Using
Dim data() As Byte = New Byte(fs.Length) {}
...
You're trying to use fs after it has been disposed. This needs to be:
Dim fs As New FileStream(FileName, FileMode.Open, FileAccess.Read)
Using (fs)
Dim data() As Byte = New Byte(fs.Length) {}
Dim br As BinaryReader = New BinaryReader(fs)
br.Read(data, 0, data.Length)
br.Close()
End Using