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    <title>MongoDB Jira</title>
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    <description>This file is an XML representation of an issue</description>
    <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-2097] ProjectionDefinition.Expression does not create correct mongo statement</title>
                <link>https://jira.mongodb.org/browse/CSHARP-2097</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;When you have a nested object where there are 2 properties such that the name of the first property starts with the name of the second property. &lt;br/&gt;
```&lt;br/&gt;
    public class SubscriberSource&lt;br/&gt;
    {&lt;br/&gt;
       /// ...&lt;br/&gt;
        public DateTime? StatusChangeDate &lt;/p&gt;
{ get; set; }&lt;br/&gt;
        public SubscriberStatus Status { get; set; }
&lt;p&gt;    }&lt;br/&gt;
```&lt;br/&gt;
And you try to build a projection, it will not generate anything for the projection at all. There is probably somewhere in the code that a .startsWith is utilized to add fields to the projection builder for some reason. &lt;/p&gt;

&lt;p&gt;So when i write something like &lt;br/&gt;
```&lt;br/&gt;
_collection.Find(query).Project(x =&amp;gt; new &lt;/p&gt;
{ x.StatusChangeDate, x.Status  }
&lt;p&gt;)&lt;br/&gt;
```&lt;br/&gt;
No projection is passed to mongoDb at all and all fields are returned. &lt;/p&gt;</description>
                <environment>Windows 10, .net standard 2 project</environment>
        <key id="459942">CSHARP-2097</key>
            <summary>ProjectionDefinition.Expression does not create correct mongo statement</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="-1">Unassigned</assignee>
                                    <reporter username="vrybak@vertmarkets.com">Vadim Rybak</reporter>
                        <labels>
                    </labels>
                <created>Thu, 16 Nov 2017 20:22:34 +0000</created>
                <updated>Mon, 11 Feb 2019 20:27:55 +0000</updated>
                            <resolved>Mon, 11 Feb 2019 20:27:46 +0000</resolved>
                                    <version>2.4.4</version>
                                                    <component>Serialization</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                    <issuelinks>
                            <issuelinktype id="10010">
                    <name>Duplicate</name>
                                            <outwardlinks description="duplicates">
                                        <issuelink>
            <issuekey id="461853">CSHARP-2106</issuekey>
        </issuelink>
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