[void][Reflection.Assembly]::LoadWithPartialName("Oracle.DataAccess")
$conStr = "Data Source=ORCL;User ID=scott;Password=tiger"
$sqlStr = "SELECT 'Hello, ADO.NET World!' AS Message FROM DUAL"
$con = New-Object Oracle.DataAccess.Client.OracleConnection($conStr)
$cmd = New-Object Oracle.DataAccess.Client.OracleCommand($sqlStr, $con)
$con.Open()
$reader = $cmd.ExecuteReader()
while ( $reader.read() )
{
    $reader.getName(0)
    "---------------------"
    $reader[0]
}
$con.Close()