Uploading fles to specific folder on BOX

Refresh token is over written on each request and store on text file.

 Function UploadToBox(ByVal attachedFilename As String, ByVal stream As System.IO.Stream) As Boolean

        Dim clientID As String
        Dim clientSecret As String
        Dim oldRefreshToken As String
        Dim newToken As BoxApi.V2.Authentication.OAuth2.OAuthToken

        clientID = ConfigurationManager.AppSettings("clientid")
        clientSecret = ConfigurationManager.AppSettings("clientsecret")

        Dim tokenProvider As New TokenProvider(clientID, clientSecret)

        '''' Reading Refresh token from the file
        Dim streamReader As StreamReader
        streamReader = System.IO.File.OpenText(Server.MapPath("~\\Box\\BoxApiRefreshToken.txt"))
        oldRefreshToken = streamReader.ReadToEnd()
        streamReader.Close()

        newToken = tokenProvider.RefreshAccessToken(oldRefreshToken)
        Dim boxManager As New BoxManager(newToken.AccessToken)

        '''' Writing the new Refresh token to the file
        Dim streamWriter As New StreamWriter(Server.MapPath("~\\Box\\BoxApiRefreshToken.txt"))
        streamWriter.Write(newToken.RefreshToken)
        streamWriter.Close()

        Dim uploadFolder As Folder

        ''''rootFolder = boxManager.GetFolder(Folder.Root)
        uploadFolder = boxManager.GetFolder(ConfigurationManager.AppSettings("uploadFolderID"))

        Dim fileName As String
        fileName = System.IO.Path.GetFileNameWithoutExtension(attachedFilename)
        fileName = fileName + "-" + Guid.NewGuid.ToString + System.IO.Path.GetExtension(attachedFilename)

        boxManager.CreateFile(uploadFolder, fileName, ConvertStreamToByteArray(stream))


    End Function

Convert stream to byte array

    Private Function ConvertStreamToByteArray(ByVal stream As System.IO.Stream) As Byte()

        Dim streamLength As Long = Convert.ToInt64(stream.Length)
        Dim fileData As Byte() = New Byte(streamLength) {}
        stream.Position = 0
        stream.Read(fileData, 0, streamLength)
        stream.Close()

        Return fileData

    End Function