C# save/view PDF from SQL database?

See the answer here: Save and view pdf file from SQL server database in c# WinForms[^]

The code in the example seems to have some garbage in it though, like:
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It should look like this I think:

Imports System.Data.SqlClient

'IF OBJECT_ID('PDF', 'U') IS NOT NULL DROP TABLE PDF
'CREATE TABLE PDF
'(
' RecordId int identity(1000, 1) PRIMARY KEY,
' PDF varbinary(max)
')

Public Class frmPDF

Private Sub ButtonUpload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonUpload.Click
Using conn As New SqlConnection("Data Source=apex2006sql;Initial Catalog=Scott;Integrated Security=True;")
conn.Open()
Using cmd As New SqlCommand("Insert Into PDF (PDF) Values (@PDF)", conn)
cmd.Parameters.Add(New SqlParameter("@PDF", SqlDbType.VarBinary)).Value = System.IO.File.ReadAllBytes("C:\file.pdf")
cmd.ExecuteNonQuery()
End Using
conn.Close()
End Using
End Sub

Private Sub ButtonDownload_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonDownload.Click
Dim sFilePath As String
Dim buffer As Byte()
Using conn As New SqlConnection("Data Source=apex2006sql;Initial Catalog=Scott;Integrated Security=True;")
conn.Open()
Using cmd As New SqlCommand("Select Top 1 PDF From PDF", conn)
buffer = cmd.ExecuteScalar()
End Using
conn.Close()
End Using
sFilePath = System.IO.Path.GetTempFileName()
System.IO.File.Move(sFilePath, System.IO.Path.ChangeExtension(sFilePath, ".pdf"))
sFilePath = System.IO.Path.ChangeExtension(sFilePath, ".pdf")
System.IO.File.WriteAllBytes(sFilePath, buffer)
Dim act As Action(Of String) = New Action(Of String)(AddressOf OpenPDFFile)
act.BeginInvoke(sFilePath, Nothing, Nothing)
End Sub

Private Shared Sub OpenPDFFile(ByVal sFilePath)
Using p As New System.Diagnostics.Process
p.StartInfo = New System.Diagnostics.ProcessStartInfo(sFilePath)
p.Start()
p.WaitForExit()
Try
System.IO.File.Delete(sFilePath)
Catch
End Try
End Using
End Sub
End Class