using an input file

For most of the scripts I have created I have done:

$vmlist="blah","blah1","blah2"      <--- would like file located for example in c:\tmp\inputfile

foreach ($vm in $vmlist)
   {
     Get-VM $vm | Select-Object   -Property Name,NumCpu |FT -AutoSize

I really would like to use an input file instead of listing it like I am above. I have tinkered with it but  im just not getting it.

Thank you!!!