Filter results by values from array

Hey Guys,

I'm writing a script to list the properties of SharePoint groups.

This piece of code works fine but returns all Sharepoint groups in $site, meaning hundreds of records.

$site = Get-SPSite https://MyWeb/MySiteCollection
$groups = $site.RootWeb.sitegroups
foreach ($grp in $groups) { do something }

So I was looking to filter the list of groups; and I came up with this other piece of code, which also works.

$site = Get-SPSite https://MyWeb/MySiteCollection
$groups = $site.RootWeb.sitegroups | ? {$_.Name -like "Training*"}
foreach ($grp in $groups) { do something }

Then I thought, why not storing the names of the groups I'm interesting in an array and select from $groups only the ones where the group name matches one of the names in my array.

So I created a file named 'Groups.ini' and typed the names of the groups I'm interested in. I wrote this script, but it doesn't work

$site = Get-SPSite https://MyWeb/MySiteCollection
$mygroups = Get-Content D:\Tools\Groups.ini
$groups = $site.RootWeb.sitegroups | ? {$_.Name -like $mygroups}
foreach ($grp in $groups) { do something }

The line I'm interested in is 

$groups = $site.RootWeb.sitegroups | ? {$_.Name -like $mygroups}

How can I select the items from $groups where the name is one of the value of my array $mygroups ?

Thanks in advance and have a nice day