Website won't release file generated with openxml - asp.net

Question

Here is the situation:
Asp.Net Web Forms site using Open XML to read in a (via a stream) word document (docx). I then insert some text into the document and then write the file back out to a different location. It is then emailed to an end user. All of this works great.
The problem i am running into is that I can't the new file written by the site. I receive the following error:
"The process cannot access the file (file name here) because it is being used nt another process"
I have confirmed that it is the site (or IIS) that is holding on to the file.
Here is the code that reads the original file and generates the new file:
Private Function GetDocument(worddoc As String) As Integer
Dim byteArray As Byte() = File.ReadAllBytes("\\WEB-DEV-1\HR_Documents\" & worddoc)
Using Stream As New MemoryStream()
Stream.Write(byteArray, 0, CInt(byteArray.Length))
Try
'Set Row & Cell variables
Dim rowNum As Integer = 0
Dim cellNum As Integer = 0
'Set File Stream
Using doc As WordprocessingDocument = WordprocessingDocument.Open(Stream, True)
'Employee Name Insert
'Find first table in document
Dim tbl1 As Table = doc.MainDocumentPart.Document.Body.Elements(Of Table).First()
'First Row in tbl
Dim row As TableRow = tbl1.Elements(Of TableRow)().ElementAt(0)
'Find first cell in row
Dim cell As TableCell = row.Elements(Of TableCell)().ElementAt(0)
'Insert selected Employee Name
Dim p As Paragraph = cell.Elements(Of Paragraph)().First()
Dim r As Run = p.Elements(Of Run)().First()
Dim txt As Text = r.Elements(Of Text)().First()
txt.Text = "Employee Name: " & ddlEmployeeList.SelectedItem.Text
'Supervisor Name Insert
'Check for form
If ddlFormChoice.SelectedIndex <> 2 Then
'Reset row to supervisors row in table
row = tbl1.Elements(Of TableRow)().ElementAt(1)
ElseIf ddlFormChoice.SelectedIndex = 2 Then
'Reset row to supervisors row in table
row = tbl1.Elements(Of TableRow)().ElementAt(2)
End If
If ddlFormChoice.SelectedIndex <> 2 Then
'Reset cell to supervisor cell in row
cell = row.Elements(Of TableCell)().ElementAt(1)
ElseIf ddlFormChoice.SelectedIndex = 2 Then
'Reset cell to supervisor cell in row
cell = row.Elements(Of TableCell)().ElementAt(0)
End If
'Insert selected Employee Name
p = cell.Elements(Of Paragraph)().First()
r = p.Elements(Of Run)().First()
txt = r.Elements(Of Text)().First()
If ddlFormChoice.SelectedIndex <> 2 Then
txt.Text = "Supervisor: " & ddlSupervisorList.SelectedItem.Text
ElseIf ddlFormChoice.SelectedIndex = 2 Then
txt.Text = "Manager/Supervisor: " & ddlSupervisorList.SelectedItem.Text
End If
doc.Close()
End Using
'Save File to temp location
File.WriteAllBytes("\\WEB-DEV-1\HR_Documents\TempDocs\" & worddoc, Stream.ToArray())
Stream.Close()
Stream.Dispose()
Return 1
Catch ex As Exception
Return Nothing
End Try
End Using
End Function
I close the OpenXML doc and the stream as well dispose of the stream but when I try to delete the file from the main sub that called the function I get the error listed above.
What am I missing?? I closed the doc, the stream and disposed of the stream. Why is the site still holding the file?
Note here the line of code that trys to delete the file;
File.Delete("\\Web-Dev-1\HR_Documents\TempDocs\" & fileAttach)

Answer 1

So after most of the day i finally found out what the problem was. After the document was created, saved , and emailed it was being held by the email method. For some reason i thought that when the method finishes that it disposed of the Mail Message but this not the case.
Once I added the dispose line it all worked fine.
Only been Googling for almost two days. :|