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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-2353] BsonDocument.DeepClone() fails on documents with duplicate element names</title>
                <link>https://jira.mongodb.org/browse/CSHARP-2353</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;The following code fails:&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;var doc = new BsonDocument() { AllowDuplicateNames = true };&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;doc.Add(&quot;a&quot;, 1);&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;doc.Add(&quot;a&quot;, 2);&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;var doc2 = doc.DeepClone();&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;

&lt;p&gt;This is because DeepClone does:&lt;/p&gt;

&lt;p&gt;{{ BsonDocument clone = new BsonDocument();}}&lt;br/&gt;
{{ foreach (BsonElement element in _elements)}}&lt;br/&gt;
{{ {}}&lt;br/&gt;
&lt;tt&gt;&#160; clone.Add(element.DeepClone());&lt;/tt&gt;&lt;br/&gt;
{{ }}}&lt;br/&gt;
{{ return clone;}}&lt;/p&gt;

&lt;p&gt;Changing the first line to:&lt;/p&gt;

&lt;p&gt;&lt;tt&gt;BsonDocument clone = new BsonDocument() { AllowDuplicateNames = AllowDuplicateNames };&lt;/tt&gt;&lt;/p&gt;

&lt;p&gt;fixes the problem.&lt;/p&gt;

&lt;p&gt;&#160;&lt;/p&gt;</description>
                <environment>All</environment>
        <key id="586167">CSHARP-2353</key>
            <summary>BsonDocument.DeepClone() fails on documents with duplicate element names</summary>
                <type id="1" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14703&amp;avatarType=issuetype">Bug</type>
                                            <priority id="4" iconUrl="https://jira.mongodb.org/images/icons/priorities/minor.svg">Minor - P4</priority>
                        <status id="10038" iconUrl="https://jira.mongodb.org/images/icons/subtask.gif" description="">Backlog</status>
                    <statusCategory id="2" key="new" colorName="default"/>
                                    <resolution id="-1">Unresolved</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="admilazz">Adam Milazzo</reporter>
                        <labels>
                    </labels>
                <created>Thu, 9 Aug 2018 19:21:03 +0000</created>
                <updated>Thu, 31 Mar 2022 00:26:51 +0000</updated>
                                            <version>2.7.0</version>
                                                    <component>BSON</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
                                                                                                                <comments>
                            <comment id="1972008" author="admilazz" created="Thu, 9 Aug 2018 20:24:56 +0000"  >&lt;p&gt;Created pull request:&#160;&lt;a href=&quot;https://github.com/mongodb/mongo-csharp-driver/pull/338&quot; class=&quot;external-link&quot; target=&quot;_blank&quot; rel=&quot;nofollow noopener&quot;&gt;https://github.com/mongodb/mongo-csharp-driver/pull/338&lt;/a&gt;&lt;/p&gt;</comment>
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