Convert DotNetZip ZipFile to Byte Array

I created a DotNetZip ZipFile with multiple entries. I would like to convert it to a byte array in order to load it using the load construct below.

   Using wrkZip As New ZipFile
        '----- create zip, add memory stream----------
       For n As Integer = 0 To wrkAr.Count - 1
           wrkFS = wrkAr(n)
           wrkZip.AddEntry(wrkFS.FileName, wrkFS.ContentStream)
       Next

   dim wrkBytes() as Byte
   dim wrkFileName as string = "Test.txt"

   ===> wrkBytes = ConvertToByteArray(wrkZip) <==== 

    context.Response.Clear()
        context.Response.ContentType = "application/force-download"
        context.Response.AddHeader("content-disposition", "attachment; filename=" & wrkFileName)
        context.Response.BinaryWrite(wrkBytes)
        wrkBytesInStream = Nothing
        context.Response.End()

      

        
        
        
      

    

I understand there is a ZipFile method for this:

wrkZip.Save(context.Response.OutputStream)

      

        
        
        
      

    

However, I have a tricky error in using this described here:

Downloading DotNetZip works on one site and not another

so I am looking for a short term workaround. A short history of the error is that ZipFile writes to disk in order and loads on a very similar website; it just doesn't work if I need it right now.

So how do I convert DotNetZip ZipFile to byte array? I have looked at other answers however they do not describe this specific case of converting an integer loaded ZipFile.