Fix JsonValueConverter to handle array and object values in Dictionary<string, JsonValue>

src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Node/JsonValueConverter.cs

@@ -27,6 +27,18 @@
                 return null;
             }
 
+            // For Object or Array types, return a JsonObject or JsonArray instance
+            // when deserializing a JsonValue. This maintains compatibility with .NET 8.0.
+            if (reader.TokenType is JsonTokenType.StartObject)
+            {
+                return (JsonValue)JsonNodeConverter.ObjectConverter.Read(ref reader, typeof(JsonObject), options)!;
+            }
+
+            if (reader.TokenType is JsonTokenType.StartArray)
+            {
+                return (JsonValue)JsonNodeConverter.ArrayConverter.Read(ref reader, typeof(JsonArray), options)!;
+            }
+
             JsonElement element = JsonElement.ParseValue(ref reader);
             return JsonValue.CreateFromElement(ref element, options.GetNodeOptions());
         }

src/libraries/System.Text.Json/tests/System.Text.Json.Tests/JsonNode/JsonValueTests.cs

@@ -626,5 +626,77 @@ public static IEnumerable<object[]> GetPrimitiveTypes()
 #endif
             static object[] Wrap<T>(T value, JsonValueKind expectedKind) => [value, expectedKind];
         }
+
+        [Fact]
+        public static void DeserializeArrayInDictionary_JsonValue_Works()
+        {
+            string json = """
+                { "names": ["Chuck"] }
+                """;
+
+            Dictionary<string, JsonValue> dict = JsonSerializer.Deserialize<Dictionary<string, JsonValue>>(json);
+            Assert.NotNull(dict);
+            Assert.True(dict.ContainsKey("names"));
+            Assert.NotNull(dict["names"]);
+            Assert.Equal(JsonValueKind.Array, dict["names"].GetValueKind());
+
+            // Also validate we can correctly get the content
+            string arrayValue = dict["names"].ToString();
+            Assert.Contains("Chuck", arrayValue);
+        }
+
+        [Fact]
+        public static void DeserializeObjectInDictionary_JsonValue_Works()
+        {
+            string json = """
+                { "person": {"name": "Chuck"} }
+                """;
+
+            Dictionary<string, JsonValue> dict = JsonSerializer.Deserialize<Dictionary<string, JsonValue>>(json);
+            Assert.NotNull(dict);
+            Assert.True(dict.ContainsKey("person"));
+            Assert.NotNull(dict["person"]);
+            Assert.Equal(JsonValueKind.Object, dict["person"].GetValueKind());
+
+            // Also validate we can correctly get the content
+            string objectValue = dict["person"].ToString();
+            Assert.Contains("Chuck", objectValue);
+        }
+
+        [Fact]
+        public static void Issue113268_JsonValueHandlesArraysAndObjects()
+        {
+            // This test specifically covers the issue reported in dotnet/runtime#113268
+            // where deserialization of Dictionary<string, JsonValue> containing arrays 
+            // failed in .NET 9.0 but worked in .NET 8.0
+
+            string json = """
+                { "names": ["Chuck"] }
+                """;
+
+            Dictionary<string, JsonValue> dict = JsonSerializer.Deserialize<Dictionary<string, JsonValue>>(json);
+            Assert.NotNull(dict);
+            Assert.True(dict.ContainsKey("names"));
+
+            // The key issue is that this line would throw in .NET 9.0 before the fix
+            JsonValue jsonValue = dict["names"]; 
+            Assert.NotNull(jsonValue);
+
+            // Additional validation
+            Assert.Equal(JsonValueKind.Array, jsonValue.GetValueKind());
+
+            // Test with an object too
+            json = """
+                { "person": {"name": "Chuck"} }
+                """;
+
+            dict = JsonSerializer.Deserialize<Dictionary<string, JsonValue>>(json);
+            Assert.NotNull(dict);
+            Assert.True(dict.ContainsKey("person"));
+
+            jsonValue = dict["person"];
+            Assert.NotNull(jsonValue);
+            Assert.Equal(JsonValueKind.Object, jsonValue.GetValueKind());
+        }
     }
 }