Array of different psobjects...

I'm trying to export an array but can't get all colums out if they are missing for the first record

Example code to demonstrate the problem

$MyArray = @()
for ($i=1; $i -le 10; $i++)
{
 $NewRecord = New-Object psobject -Property @{Col1 = "Row$i"}
 for ($t=1+$i; $t -le 25+$i; $t++)
 {
  $NewRecord | Add-Member NoteProperty -Name "Col$t" -Value "Blah"
 }
 $MyArray = $MyArray + $NewRecord
}
$MyArray | export-csv .\csv.csv -delimiter ";" -notype

File looks fine, but only print "col"s present in "row1"

$MyArray | fl * show the data is there

I could create a dummy record at index 0 with all data but that would be plain old ugly