powershell contains not working

I am trying filter by the name of each share using $Share.Name. However, when I try to use -contains in the if statement below, I get no results.

The result I want should be ADMIN$ - C:\ADMIN$

I am working my way to being able to have a variable like: $ExcludeShares = "ADMIN$" and filtering based on if the $String.Name is in $ExcludeShares

I am open to ideas on other ways to filter this.

Thanks in advance!

function GetAllUsedShares{
    [psobject]$Shares = Get-WmiObject -Class win32_share
    Foreach($Share in $Shares){
        $name = [string]$Share.Name
        if ($name -contains 'admin'){
            Write-Host $Share.Name - $Share.Path
        }

    }   
}