Add `JsonElement.GetPropertyCount()`

[eiriktsarpalis]

API Proposal

Even though JsonElement exposes API for getting the length of a given array, there is no equivalent functionality for objects:

namespace System.Text.Json;

public partial struct JsonElement
{
     public int GetArrayLength();
+    public int GetPropertyCount();
}

API Usage

JsonElement element = JsonSerializer.Deserialize<JsonElement>("""{ "foo" : 1, "bar" : 2 }""");
Console.WriteLine(element.GetPropertyCount()); // 2

/cc @bartonjs

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[terrajobst]

Video

• Looks good as proposed

namespace System.Text.Json;

public partial struct JsonElement
{
    public int GetPropertyCount();
}

[eiriktsarpalis]

The implementation already exists as an internal method, marking up-for-grabs as this is an easy task for anybody looking to contribute.