Use custom JsonConverter to serialize and deserialize values

CustomJsonCoverter.cs

using System.Text.Json;
using System.Text.Json.Serialization;

string json = """
              {
                "Status": "PENDING"
              }
              """;


var customerTask = JsonSerializer.Deserialize<CustomerTask>(json);
Console.WriteLine($"Status: {customerTask!.Status}");

internal sealed class CustomerTask
{
    [JsonConverter(typeof(CustomerTaskStatusJsonConverter))]
    public CustomerTaskStatus Status { get; set; }
}

internal enum CustomerTaskStatus
{
    Pending = 1,
    Completed = 2,
    Cancelled = 3
}


internal sealed class CustomerTaskStatusJsonConverter : JsonConverter<CustomerTaskStatus>
{
    /// <inheritdoc />
    public override CustomerTaskStatus Read(ref Utf8JsonReader reader,
        Type typeToConvert,
        JsonSerializerOptions options)
    {
        return Enum.Parse<CustomerTaskStatus>(reader.GetString()!, true);
    }

    /// <inheritdoc />
    public override void Write(Utf8JsonWriter writer,
        CustomerTaskStatus value,
        JsonSerializerOptions options)
    {
        writer.WriteStringValue(value.ToString().ToUpper());
    }
}