Support JsonEncodedText propertyName for JsonElement.TryGetProperty

[campersau]

Is there a specific reason why System.Text.Json.JsonElement.TryGetProperty does not accept a JsonEncodedText as a propertyname parameter directly? It would make it easier to use the existing JsonEncodedTexts for the Utf8JsonWriter to be also used by JsonElement.TryGetProperty.

The current workaround is to pass in the JsonEncodedText.EncodedUtf8Bytes manually like this:

System.Text.Json.JsonEncodedText nameJson = System.Text.Json.JsonEncodedText.Encode("name");
System.Text.Json.JsonDocument doc = ...;

doc.RootElement.TryGetProperty(nameJson.EncodedUtf8Bytes, out System.Text.Json.JsonElement _);

Suggestion:

namespace System.Text.Json
{
    public readonly struct JsonElement
    {
        // existing methods
        public bool TryGetProperty(ReadOnlySpan<byte> utf8PropertyName, out JsonElement value);
        public bool TryGetProperty(ReadOnlySpan<char> propertyName, out JsonElement value);
        public bool TryGetProperty(string propertyName, out JsonElement value);

+       public bool TryGetProperty(JsonEncodedText propertyName, out JsonElement value);
    }
}

The same question also applies to System.Text.JsonUtf8JsonReader.ValueTextEquals.

[huoyaoyuan]

This is an api suggestion and is better to be an issue.

[campersau]

Okay, done in #53858