Creating a table and rows

All,

  So, I'm tinkering around with creating an array and then adding rows and I'm trying to understand this behavior.

For example:

If I do this:

$table = @()

$row = "" | Select Name,Value

$row.Name = "test"

$row.Value = "Prod"

$table += $row

$table

Name                                                        Value
----                                                        -----
test                                                        Prod

It works.  Then if i try to add another row with out initializing a new $row array it overwrites the original why?

$row.Name = "test2"

$row.Value = "NonProd"

$table += $row

$table

Name                                                        Value
----                                                        -----
test2                                                       NonProd
test2                                                       NonProd

But if I do this it adds to bottom.  Why does it behave this way where I have to reinitialize the row every time?

$row = "" | Select Name,Value

$row.Name = "test"

$row.Value = "Prod"

$table += $row

Name                                                        Value
----                                                        -----
test2                                                       NonProd
test2                                                       NonProd
test                                                        Prod