NegativeMatchingTest.ps1
$var="The-quick-brown-fox-jumped-over-the-lazy-dog."
$var2="The quick brown fox jumped over the lazy dog."
$regex=[regex]"\s{1}"
$var
if (($regex.IsMatch($var)) -eq "False") 
{
write-host "Expression has spaces" 
}
else
{
write-host "Expression has no spaces" }

$var2
if (($regex.IsMatch($var2)) -eq "False") 
{
write-host "Expression has spaces" 
}
else
{
write-host "Expression has no spaces" }