System.Text.Json inconsistent behavior using JsonExtensionData on JsonObject #61080
Description
Description
When I use the JsonExtensionData, I found that the JsonObject is a little different from Dictionary<string, object>/Dictionary<string, JsonElement>, not sure if it‘s by design or a bug.
The last one is using the JsonObject, test code is below
Reproduction Steps
using static System.Console;
var p = JsonSerializer.Deserialize<Person>(jsonString);
ArgumentNullException.ThrowIfNull(p, nameof(p));
WriteLine(JsonSerializer.Serialize(p));
var p1 = JsonSerializer.Deserialize<Person1>(jsonString);
ArgumentNullException.ThrowIfNull(p1, nameof(p1));
WriteLine(JsonSerializer.Serialize(p1));
var p2 = JsonSerializer.Deserialize<Person2>(jsonString);
ArgumentNullException.ThrowIfNull(p2, nameof(p2));
WriteLine(JsonSerializer.Serialize(p2));
var p3 = JsonSerializer.Deserialize<Person3>(jsonString);
ArgumentNullException.ThrowIfNull(p3, nameof(p3));
WriteLine(JsonSerializer.Serialize(p3));
public record Person(string Name, int Age);
public record Person1(string Name, int Age) : Person(Name, Age)
{
[JsonExtensionData]
public Dictionary<string, object?> Extensions { get; set; } = new();
}
public record Person2(string Name, int Age) : Person(Name, Age)
{
[JsonExtensionData]
public Dictionary<string, JsonElement> Extensions { get; set; } = new(StringComparer.OrdinalIgnoreCase);
}
public record Person3(string Name, int Age) : Person(Name, Age)
{
[JsonExtensionData]
public JsonObject? Extensions { get; set; }
}Expected behavior
Maybe the JsonObject should behave as Dictionary<string, object>/Dictionary<string, JsonElement>
Actual behavior
Regression?
No response
Known Workarounds
No response
Configuration
.NET 6 RC2
Windows
x64
Other information
No response