C# 自定义序列化问题

public class overdue

{

public int overdueTimes { get; set; }

/// <summary>

/// 90天以上逾期次数

/// </summary>

[JsonProperty(PropertyName = "90overdueTimes")]

public int overdueTimes90 { get; set; }

/// <summary>

/// 180天以上逾期次数

/// </summary>

[JsonProperty(PropertyName = "180overdueTimes")]

public int overdueTimes180 { get; set; }

}