Powershell hashtables as argument to custom cmdlet in C#
import-module .MyClassLib.dll

$task = New-Object MyClassLib.OracleScript -Property @{
                                                            Files="MyScript.sql"
                                                            Database="TEST"
                                                            User="USER"
                                                            Password="PASSWORD"
                                                        }
$result = $task.Execute()

Invoke-OracleScript @{
                            Files="Script.sql"
                            Database="db"
                            User="user"
                            Password="password"
                           }

Invoke-OracleScript @{
                            Files="Script.sql";
                            Database="db";
                            User="user";
                            Password="password";
                           }

Invoke-OracleScript -Property @{
                            Files="Script.sql"
                            Database="db"
                            User="user"
                            Password="password"
                           }

[Cmdlet(VerbsLifecycle.Invoke, "OracleScript", ConfirmImpact = ConfirmImpact.High, SupportsShouldProcess = true, SupportsTransactions = false)]
public class Invoke_OracleScript : Cmdlet, IOracleScript
{
    [Parameter(Mandatory = true, Position = 0, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true)]
    public string Files { get; set; }

    [Parameter(Mandatory = true, Position = 1, ValueFromPipeline = true, ValueFromPipelineByPropertyName = true)]
    public string Database { get; set; }
    ....

get-process -Name notepad `
            -Computername localhost `
            -Verbose

$process = new-object psobject
$process | add-member -name name -value notepad -type noteproperty
$process | add-member -name computername -value localhost -type noteproperty
$process | get-process

$process = new-object psobject -property @{ name="notepad";
                                            computername = "localhost";}

$process | get-process

Function Add-ThreeNumbers {
param ($a,$b,$c)
$a + $b + $c
}

$params = @{a=10; b=15; c = 20}

Add-ThreeNumbers @params