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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-1033] Make all custom Exception classes be fully [Serializable]</title>
                <link>https://jira.mongodb.org/browse/CSHARP-1033</link>
                <project id="10041" key="CSHARP">C# Driver</project>
                    <description>&lt;p&gt;The .NET Framework Exception class is declared as:&lt;/p&gt;

&lt;p/&gt;
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&lt;p/&gt;

&lt;p&gt;This means that all custom exceptions deriving from Exception must also be marked &lt;span class=&quot;error&quot;&gt;&amp;#91;Serializable&amp;#93;&lt;/span&gt; and must implement the ISerializable interface. Implementing ISerializable involves implementing the GetObjectData method and providing a special constructor for deserialization.&lt;/p&gt;

&lt;p&gt;The problem is that custom exceptions that have a lot of custom data would have to serialize all that custom data, which typically means that all the custom data must be &lt;span class=&quot;error&quot;&gt;&amp;#91;Serializable&amp;#93;&lt;/span&gt; also, as well as all of its fields (and so on...). This can result in requiring a &lt;b&gt;lot&lt;/b&gt; of classes to be &lt;span class=&quot;error&quot;&gt;&amp;#91;Serializable&amp;#93;&lt;/span&gt; that we might not otherwise have any reason to support serialization for.&lt;/p&gt;

&lt;p&gt;An easy shortcut is for custom exceptions to just drop the custom data it doesn&apos;t know how to serialize. That means that when the custom exception is deserialized at the receiving end all of its custom data will be zero or null.&lt;/p&gt;

&lt;p&gt;We don&apos;t think many people care about throwing driver custom exceptions across boundaries that require them to be serialized (.NET remoting and cross-AppDomain for example).&lt;/p&gt;

&lt;p&gt;Therefore we probably won&apos;t bother to make custom exceptions fully &lt;span class=&quot;error&quot;&gt;&amp;#91;Serializable&amp;#93;&lt;/span&gt;. They will serialize, just that when deserialized all the custom data will be missing.&lt;/p&gt;

&lt;p&gt;If you have any use cases where you need custom exceptions to fully support &lt;span class=&quot;error&quot;&gt;&amp;#91;Serializable&amp;#93;&lt;/span&gt; please comment on this ticket.&lt;/p&gt;</description>
                <environment></environment>
        <key id="152386">CSHARP-1033</key>
            <summary>Make all custom Exception classes be fully [Serializable]</summary>
                <type id="4" iconUrl="https://jira.mongodb.org/secure/viewavatar?size=xsmall&amp;avatarId=14710&amp;avatarType=issuetype">Improvement</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="2">Won&apos;t Fix</resolution>
                                        <assignee username="-1">Unassigned</assignee>
                                    <reporter username="robert@mongodb.com">Robert Stam</reporter>
                        <labels>
                    </labels>
                <created>Wed, 13 Aug 2014 14:43:49 +0000</created>
                <updated>Mon, 25 Mar 2019 19:50:04 +0000</updated>
                            <resolved>Mon, 25 Mar 2019 19:50:04 +0000</resolved>
                                    <version>1.9.2</version>
                                                    <component>Error Handling</component>
                                        <votes>0</votes>
                                    <watches>1</watches>
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