public void WriteJson(JsonWriter writer)
{
writer.WriteStartObject();
writer.WritePropertyName(nameof(Duration));
writer.WriteRawValue(Duration.ToRoundTripString());
writer.WritePropertyName(nameof(TimeStep));
writer.WriteRawValue(TimeStep.ToRoundTripString());
writer.WritePropertyName(nameof(MeshKeys));
writer.WriteStartArray();
for (int i = 0; i < MeshKeys.Count; ++i)
{
writer.WriteRawValue(MeshKeys[i].ToRoundTripString());
}
writer.WriteEndArray();
writer.WriteEndObject();
}