Asp vb drawing barcode using a .tiff

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VB

ASP

read-only

barcode

i need to generate a barcode without any library (if exist one commercial free),
i have this code but always said
Font is ReadOnly,
i found a lot of pages but any said how fix it
this is the code :

Imports System.Drawing
Imports System.Drawing.Text

Partial Class codigo_barras
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(sender As Object, e As System.EventArgs) Handles Button1.Click
        Dim family As FontFamily
        Dim pfc As PrivateFontCollection
        pfc = New PrivateFontCollection()
        pfc.AddFontFile("C:\Fonts\EAN-13.TTF")
        family = pfc.Families(0)

        TextBox1.Enabled = False
        TextBox1.Font = Font(family, 40.0F)
        TextBox2.Text = String.Format("*{0}*", "123456")

    End Sub

End Class

What I have tried:

i tried to find how fix it but any page said something usefull, only if you use libraries or dll, works perfectly, but i need without any library, or not pay for commercial use
and i don't now how fix this error, if you do for windows aplication works, but i nee for asp.net in vb.