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Add thread-safety documentation to JsonSerializer class page #12715

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Copilot Jun 5, 2026
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Add thread safety documentation to JsonSerializer class
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1 change: 1 addition & 0 deletions xml/System.Text.Json/JsonSerializer.xml
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Expand Up @@ -41,6 +41,7 @@ For more information, see [How to serialize and deserialize JSON](/dotnet/standa

]]></format>
</remarks>
<threadsafe>All public static members of <see cref="T:System.Text.Json.JsonSerializer" /> are thread-safe and may be used concurrently from multiple threads. The serializer is designed for thread safety; however, <see cref="T:System.Text.Json.JsonSerializerOptions" /> instances are not thread-safe during initial configuration. Once a <see cref="T:System.Text.Json.JsonSerializerOptions" /> instance is passed to a <see cref="T:System.Text.Json.JsonSerializer" /> method or is otherwise made read-only, it can be safely shared across multiple threads. Avoid concurrent modification of a shared <see cref="T:System.Text.Json.JsonSerializerOptions" /> instance while it is still mutable.</threadsafe>
</Docs>
<Members>
<Member MemberName="Deserialize">
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