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        <version>9.7.1</version>
        <build-number>970001</build-number>
        <build-date>13-04-2023</build-date>
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<item>
            <title>[CSHARP-65] LINQ Query returns non empty result collection when it shouldn&apos;t</title>
                <link>https://jira.mongodb.org/browse/CSHARP-65</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Given the following entity and an &lt;em&gt;empty&lt;/em&gt; collection in the database:&lt;/p&gt;

&lt;p&gt;public class Post&lt;br/&gt;
{&lt;br/&gt;
	&lt;span class=&quot;error&quot;&gt;&amp;#91;MongoId&amp;#93;&lt;/span&gt;&lt;br/&gt;
	public Guid Id &lt;/p&gt;
{ get; set; }&lt;br/&gt;
	&lt;br/&gt;
	public DateTime LastAccess { get; set; }
&lt;p&gt;	public List&amp;lt;string&amp;gt; Tags &lt;/p&gt;
{ get; set; }
&lt;p&gt;}	&lt;/p&gt;

&lt;p&gt;The following query should return an empty list but it returns a list containing a single empty Post entity:&lt;/p&gt;

&lt;p&gt;List&amp;lt;string&amp;gt; SearchTags = new List&amp;lt;string&amp;gt; &lt;/p&gt;
{&quot;test&quot;}
&lt;p&gt;;&lt;/p&gt;

&lt;p&gt;var result = SearchTags.Aggregate(posts.Linq(), (current, tag) =&amp;gt; current.Where(x =&amp;gt; x.Tags.Any(t =&amp;gt; t == tag))).OrderByDescending(&lt;br/&gt;
  x =&amp;gt; x.LastAccess).Skip(skip).Take(take).ToList();&lt;/p&gt;</description>
                <environment></environment>
        <key id="13085">CSHARP-65</key>
            <summary>LINQ Query returns non empty result collection when it shouldn&apos;t</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="3" iconUrl="https://jira.mongodb.org/images/icons/priorities/major.svg">Major - P3</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="3">Duplicate</resolution>
                                        <assignee username="sam">Sam Corder</assignee>
                                    <reporter username="oliverw">Oliver Weichhold</reporter>
                        <labels>
                    </labels>
                <created>Tue, 14 Sep 2010 09:27:54 +0000</created>
                <updated>Wed, 19 Oct 2016 14:16:07 +0000</updated>
                            <resolved>Fri, 29 Oct 2010 14:25:28 +0000</resolved>
                                                                    <component>SAMUS</component>
                                        <votes>0</votes>
                                    <watches>0</watches>
                                                                                                                <comments>
                            <comment id="19826" author="lanwin" created="Fri, 29 Oct 2010 14:25:28 +0000"  >&lt;p&gt;Migrated to &lt;a href=&quot;http://github.com/mongodb-csharp/mongodb-csharp/issues/issue/19&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;http://github.com/mongodb-csharp/mongodb-csharp/issues/issue/19&lt;/a&gt;&lt;/p&gt;</comment>
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