Need to create, use and store dynamic object names in Powershell

I am loading in a text file and looping through each line, and trying to print a checkbox, in a powershell form. However, the way below, all checkboxes have the same variable/object name, which makes it impossible to tell them apart.

I need a way to dynamically create $checkbox0 through $checkbox(# of lines in text file, which can change), and fill them in below, as well as store the names, so i can validate if they are clicked later

$pFile = Get-Content "C:\results.txt"
$rowCounter = 0
foreach($line in $pFile){
    $checkbox = New-Object System.Windows.Forms.CheckBox
    $checkbox.UseVisualStyleBackColor = $True
    $System_Drawing_Size = New-Object System.Drawing.Size
    $checkbox.AutoSize = "true"
    $checkbox.TabIndex = $rowCounter
    $checkbox.Text = $line
    $System_Drawing_Point = New-Object System.Drawing.Point
    $System_Drawing_Point.X = 25
    $yValue = (20 * $rowCounter)
    $System_Drawing_Point.Y = $yValue
    $checkbox.Location = $System_Drawing_Point
    $checkbox.DataBindings.DefaultDataSourceUpdateMode = 0
    $Form1.Controls.Add($checkbox)
    $rowCounter = $rowCounter + 1
}