Looks like my PowerShell got rusty…

This confused me for a minute. But once I realized what was going on I felt like a dolt.

$Query = $UriBuilder.Query

if ($Query.Length > 1) {
    $Query = $Query.Substring(1) + '&'
}

$UriBuilder.Query = $Query + $KeyValuePair

Access to the path 'C:\Windows\system32\1' is denied.
At C:\Blah\Blah.psm1:366 char:32
+             if ($Query.Length > <<<<  1) {
    + CategoryInfo          : OpenError: (:) [], UnauthorizedAccessException
    + FullyQualifiedErrorId : FileOpenFailure