File size in vb.net -

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in form1 have textbox1, in textbox have location of file "c:\folder\file.iso"

in form2 want file size of file in textbox1 tried this

        dim filedetail io.fileinfo       filedetail = my.computer.filesystem.getfileinfo(form1.textbox1.text)      label1.text = size: filedetail.length end sub

i dont error, size of file isn't showed in label.

edit: doesn't seem work

private sub unscramble_load(byval sender system.object, byval e system.eventargs) handles mybase.load     if system.io.file.exists(form1.textbox2.text)         dim fi new system.io.fileinfo(form1.textbox2.text)         label3.text = "size: " & fi.length.tostring()     end if end sub

it still doesn't give me size of file nor gives "size:" 

    dim filedetail = my.computer.filesystem.getfileinfo(form1.textbox1.text)     label1.text = "size : " & filedetail.length

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