# System.Text.Json.Serialization.Metadata

``` diff
 namespace System.Text.Json.Serialization.Metadata {
     public abstract class JsonTypeInfo {
+        public JsonUnmappedMemberHandling? UnmappedMemberHandling { get; set; }
     }
     public static class JsonTypeInfoResolver {
-        public static IJsonTypeInfoResolver Combine(params IJsonTypeInfoResolver[] resolvers);
+        public static IJsonTypeInfoResolver Combine(params IJsonTypeInfoResolver?[] resolvers);
     }
 }
```

