Obsolete attribute is ignored in constructor property assignment.

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Topic

In this session, we address the issue of the Obsolete attribute being ignored in constructor property assignment. In the following example, the IgnoreNullValues property is marked as obsolete, but it is still being used in the constructor.


    System.Text.Json.JsonSerializerOptions(JsonSerializerDefaults.Web, IgnoreNullValues = true)

Expected behavior:

The compiler should raise a warning or error when the IgnoreNullValues property is used in the constructor.

Actual behavior:

The Obsolete attribute is ignored in the constructor property assignment.

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Edgar Gonzalez