types/String.Types.ps1xml

<?xml version="1.0" encoding="utf-8" ?>
<Types>
    <Type>
        <Name>System.String</Name>
        <Members>
            <ScriptMethod>
                <Name>Permutations</Name>
                <Script>
                    Get-Permutation $this -Words
                </Script>
            </ScriptMethod>
            <ScriptMethod>
                <Name>ToMoney</Name>
                <Script>
                    Format-MoneyValue $this
                </Script>
            </ScriptMethod>
        </Members>
    </Type>
    <Type>
        <Name>System.Security.SecureString</Name>
        <Members>
            <ScriptMethod>
                <Name>ToPlainText</Name>
                <Script>
                    ConvertTo-PlainText $this
                </Script>
            </ScriptMethod>
        </Members>
    </Type>
</Types>