How to initialize a Generic.List PowerShell

This is a very simple question but I spent 2 hours Googling not a single one works. 

$MyInList = New-Object System.Collections.Generic.List[string]

$MyInlist.Add("sdf", "sdfsdf");
$MyInlist.Addrange(("sdf", "sdfsdf"));
$MyInlist{"sdf", "sdfsdf"}
$MyInlist.Add["sdf", "sdfsdf"]
$MyInlist
for($a=0; $a -le $MyInlist.Count; $a++){

   Write-Output $MyInlist[$a]
}

I have tried all possible combination suggested by Google and mine own but none work. To display the content I have $MyInlist all by itself and the for loop they display nothing.

I dont know what I am doing wrong but both the initialize

and to display the contents nothing works. Please suggest a fix.