Url rewrite to lower case not working - asp.net

Question

I have the following rewrite rules in my web.config. The canonical rule works, however the lower case rule doesn't.
I'm trying to test it like this: www.mysite.com/UPPERCASE. I would have expected the url to be transformed to www.mysite.com/uppercase, but it stays in uppercase. What am I doing wrong?
<rewrite xdt:Transform="Insert">
<rules>
<rule name="LowerCaseRule" patternSyntax="ExactMatch">
<match url="[A-Z]" ignoreCase="false"/>
<action type="Redirect" url="{ToLower:{URL}}"/>
</rule>
<rule name="CanonicalHostName">
<match url="(.*)" />
<conditions logicalGrouping="MatchAll">
<add input="{HTTP_HOST}" pattern="^www.mysite.com$" negate="true" />
</conditions>
<action type="Redirect" url="{MapSSL:{HTTPS}}www.mysite.com/{R:1}" redirectType="Permanent" />
</rule>
</rules>
<rewriteMaps>
<rewriteMap name="MapSSL" defaultValue="OFF">
<add key="ON" value="https://" />
<add key="OFF" value="http://" />
</rewriteMap>
</rewriteMaps>
</rewrite>

Answer 1

You should remove patternSyntax="ExactMatch" from the rule LowerCaseRule because in your case, you want to use the regular expression system (which comes by default or by setting patternSyntax="ECMAScript").
So your rule should be:
<rule name="LowerCaseRule">
<match url="[A-Z]" ignoreCase="false"/>
<action type="Redirect" url="{ToLower:{URL}}"/>
</rule>

Answer 2

Try this
<rule name="LowerCaseRule" stopProcessing="true">
<conditions logicalGrouping="MatchAll" trackAllCaptures="false">
<add input="{URL}" pattern=".*[A-Z].*" ignoreCase="false" />
</conditions>
<action type="Redirect" url="{ToLower:{URL}}" />
</rule>

Answer 3

This was better for me. I noticed {URL} does not properly resolve when you have a path like cassete.axd/scripts/myscript.js?xxx, it will redirect to cassette.axd?xxx instead.
<rule name="LowerCaseRule - HTTPS">
<match url="[A-Z]" ignoreCase="false"/>
<conditions>
<add input="{HTTPS}" pattern="on" ignoreCase="true"/>
</conditions>
<action type="Redirect" url="https://{ToLower:{HTTP_HOST}}{ToLower:{PATH_INFO}}" appendQueryString="true"/>
</rule>
<rule name="LowerCaseRule - HTTP">
<match url="[A-Z]" ignoreCase="false"/>
<conditions>
<add input="{HTTPS}" pattern="off" ignoreCase="true"/>
</conditions>
<action type="Redirect" url="http://{ToLower:{HTTP_HOST}}{ToLower:{PATH_INFO}}" appendQueryString="true"/>
</rule>
Hope this helps someone.