release-notes/7.0/preview/api-diff/preview6/Microsoft.NETCore.App/7.0-preview6_System.Text.Json.md


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# System.Text.Json

``` diff
 namespace System.Text.Json {
     public sealed class JsonSerializerOptions {
+        public IJsonTypeInfoResolver TypeInfoResolver { [RequiresDynamicCodeAttribute("JSON serialization and deserialization might require types that cannot be statically analyzed and might need runtime code generation. Use System.Text.Json source generation for native AOT applications.")] get; set; }
     }
 }
```