using System;

using Newtonsoft.Json;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string data = "00000000630000.00";

        Console.WriteLine(data.Split('.')[0]);

    }

}

​

public class TestA

{

        [JsonProperty("_age")]

        public int Age { get; set; }

}