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    <language>en-us</language>    <build-info>
        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CSHARP-4561] Version 2.19 breaks ToUpper comparison</title>
                <link>https://jira.mongodb.org/browse/CSHARP-4561</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;h4&gt;&lt;a name=&quot;Summary&quot;&gt;&lt;/a&gt;Summary&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;With the latest version of the mongo db c# driver and linq3, the expression comparison of a string value with the call of a ToUpper is broken.&lt;/em&gt;&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;Pleaseprovidetheversionofthedriver.Ifapplicable%2CpleaseprovidetheMongoDBserverversionandtopology%28standalone%2Creplicaset%2Corshardedcluster%29.&quot;&gt;&lt;/a&gt;Please provide the version of the driver. If applicable, please provide the MongoDB server version and topology (standalone, replica set, or sharded cluster).&lt;/h4&gt;
&lt;h4&gt;&lt;a name=&quot;HowtoReproduce&quot;&gt;&lt;/a&gt;How to Reproduce&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;I want create a dynamic query and create a query expression like this&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;&lt;em&gt;item =&amp;gt; ((item.StringValue != null) AndAlso item.StringValue.ToUpper().Contains(&quot;foo&quot;))&lt;/em&gt;&lt;/p&gt;

&lt;p&gt;which then translate into this&lt;/p&gt;

&lt;p&gt;database.collection.Aggregate([{ &quot;$match&quot; : { &quot;$and&quot; : [{ &quot;stringValue&quot; : &lt;/p&gt;
{ &quot;$ne&quot; : null }
&lt;p&gt; }, { &quot;_id&quot; : &lt;/p&gt;
{ &quot;$type&quot; : -1 }
&lt;p&gt; }] } }])&lt;/p&gt;
&lt;h4&gt;&lt;a name=&quot;AdditionalBackground&quot;&gt;&lt;/a&gt;Additional Background&lt;/h4&gt;

&lt;p&gt;&lt;em&gt;-&lt;/em&gt;&lt;/p&gt;</description>
                <environment></environment>
        <key id="2281918">CSHARP-4561</key>
            <summary>Version 2.19 breaks ToUpper comparison</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="10300" iconUrl="https://jira.mongodb.org/images/icons/priorities/medium.svg">Unknown</priority>
                        <status id="6" iconUrl="https://jira.mongodb.org/images/icons/statuses/closed.png" description="The issue is considered finished, the resolution is correct. Issues which are closed can be reopened.">Closed</status>
                    <statusCategory id="3" key="done" colorName="success"/>
                                    <resolution id="13202">Works as Designed</resolution>
                                        <assignee username="robert@mongodb.com">Robert Stam</assignee>
                                    <reporter username="mo1987@gmx.net">Martin Oehlert</reporter>
                        <labels>
                    </labels>
                <created>Mon, 6 Mar 2023 15:27:04 +0000</created>
                <updated>Fri, 27 Oct 2023 13:24:38 +0000</updated>
                            <resolved>Mon, 6 Mar 2023 17:58:07 +0000</resolved>
                                    <version>2.19.0</version>
                                                    <component>LINQ3</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="5252555" author="rstam" created="Mon, 6 Mar 2023 17:57:51 +0000"  >&lt;p&gt;`item.StringValue.ToUpper().Contains(&quot;foo&quot;)` can never be true.&lt;/p&gt;

&lt;p&gt;A condition that can never be true translates to `{ _id : &lt;/p&gt;
{ $type : -1 }
&lt;p&gt; }`, which is an MQL filter that can never match anything.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</comment>
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                            <customfieldvalue>&lt;p&gt;1.  What would you like to communicate to the user about this feature?&lt;br/&gt;
2.  Would you like the user to see examples of the syntax and/or executable code and its output?&lt;br/&gt;
3.  Which versions of the driver/connector does this apply to?&lt;/p&gt;</customfieldvalue>

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