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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-1962] Linq projection execute on client side</title>
                <link>https://jira.mongodb.org/browse/CSHARP-1962</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;Hello.&lt;br/&gt;
I use mongocharpdriver with legacy driver.&lt;br/&gt;
Code like this:&lt;/p&gt;
&lt;p/&gt;
&lt;div id=&quot;syntaxplugin&quot; class=&quot;syntaxplugin&quot; style=&quot;border: 1px dashed #bbb; border-radius: 5px !important; overflow: auto; max-height: 30em;&quot;&gt;
&lt;table cellspacing=&quot;0&quot; cellpadding=&quot;0&quot; border=&quot;0&quot; width=&quot;100%&quot; style=&quot;font-size: 1em; line-height: 1.4em !important; font-weight: normal; font-style: normal; color: black;&quot;&gt;
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				&lt;tr id=&quot;syntaxplugin_code_and_gutter&quot;&gt;
						&lt;td  style=&quot; line-height: 1.4em !important; padding: 0em; vertical-align: top;&quot;&gt;
					&lt;pre style=&quot;font-size: 1em; margin: 0 10px;  margin-top: 10px;   margin-bottom: 10px;  width: auto; padding: 0;&quot;&gt;&lt;span style=&quot;color: #006699; font-weight: bold; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt;var&lt;/span&gt;&lt;span style=&quot;color: black; font-family: &apos;Consolas&apos;, &apos;Bitstream Vera Sans Mono&apos;, &apos;Courier New&apos;, Courier, monospace !important;&quot;&gt; result = objectsCollection.AsQueryable().Select(o =&amp;gt; o.Id).ToList();&lt;/span&gt;&lt;/pre&gt;
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&lt;p/&gt;
&lt;p&gt;was executed very slowly because it is running on client side and deserialising all objects in collection.&lt;br/&gt;
Why linq query like this do not executed on server side?&lt;/p&gt;</description>
                <environment>Windows 8.1</environment>
        <key id="374042">CSHARP-1962</key>
            <summary>Linq projection execute on client side</summary>
                <type id="3" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14718&amp;avatarType=issuetype">Task</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</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="IlyaK">Ilya</reporter>
                        <labels>
                            <label>question</label>
                    </labels>
                <created>Fri, 14 Apr 2017 10:32:17 +0000</created>
                <updated>Fri, 27 Oct 2023 13:25:08 +0000</updated>
                            <resolved>Fri, 14 Apr 2017 13:33:25 +0000</resolved>
                                    <version>2.2.4</version>
                                                    <component>Linq</component>
                                        <votes>0</votes>
                                    <watches>2</watches>
                                                                                                                <comments>
                            <comment id="1549201" author="rstam" created="Fri, 14 Apr 2017 13:32:41 +0000"  >&lt;p&gt;The Legacy API exists for backward compatibility only and is no longer being enhanced. The LINQ implementation in the Legacy API does not support server side projections.&lt;/p&gt;

&lt;p&gt;The LINQ implementation in the current (2.x) version of the driver &lt;b&gt;does&lt;/b&gt; support server side projections.&lt;/p&gt;</comment>
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