Write a portion of your script in C# (or another .NET language) - use the -MemberDefinition parameter of the Add-Type class.
#############################################################################
##
## Invoke-Inline
##
## From Windows PowerShell Cookbook (O'Reilly)
## by Lee Holmes (http://www.leeholmes.com/guide)
##
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<#
.SYNOPSIS
Demonstrates the Add-Type cmdlet to invoke in-line C#.
#>
Set-StrictMode -Version 3
$inlineType = Add-Type -Name InvokeInline_Inline -PassThru -MemberDefinition @'
public static int RightShift(int original, int places)
{
return original >> places;
}
'@
$inlineType::RightShift(1024, 3)