DataContract with Json.Net

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如果class使用了DataContract，name没有使用DataMember的property就不解析

[DataContract]
public class File
{
    // excluded from serialization
    // does not have DataMemberAttribute
    public Guid Id { get; set; }

    [DataMember]
    public string Name { get; set; }

    [DataMember]
    public int Size { get; set; }
}

File file = new File
{
    Id = Guid.NewGuid(),
    Name = "ImportantLegalDocuments.docx",
    Size = 50 * 1024
};

string json = JsonConvert.SerializeObject(file, Formatting.Indented);

Console.WriteLine(json);
// {
//   "Name": "ImportantLegalDocuments.docx",
//   "Size": 51200
// }