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NuGet/Converters/ManifestPackageKeyJsonConverter.cs

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+using System.Text.Json;
+using System.Text.Json.Serialization;
+using NuGet.Deps;
+
+namespace NuGet.Converters;
+
+public class ManifestPackageKeyJsonConverter : JsonConverter<ManifestPackageKey>
+{
+    public override ManifestPackageKey Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+    {
+        if (reader.TokenType != JsonTokenType.String)
+            throw new JsonException("Invalid package key string");
+        
+        return ManifestPackageKey.Parse(reader.GetString()!);
+    }
+
+    public override void Write(Utf8JsonWriter writer, ManifestPackageKey value, JsonSerializerOptions options)
+    {
+        writer.WriteStringValue(value.ToString());
+    }
+
+    public override ManifestPackageKey ReadAsPropertyName(ref Utf8JsonReader reader, Type typeToConvert,
+        JsonSerializerOptions options) => Read(ref reader, typeToConvert, options);
+
+    public override void WriteAsPropertyName(Utf8JsonWriter writer, ManifestPackageKey value,
+        JsonSerializerOptions options)
+    {
+        writer.WritePropertyName(value.ToString());
+    }
+}