using System;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {       

        var json = 

        @"{

            ""ReloadThresholdAmount"": 10.2, 

            ""ReloadAmount"": 10

        }";

        var account = JsonConvert.DeserializeObject<ReplenishAccount>(json);

        Console.WriteLine("ReloadThresholdAmount: {0:0.0}; ReloadAmount: {1:0.0}", account.ReloadThresholdAmount, account.ReloadAmount);

    }

    public class ReplenishAccount

    {

        public decimal ReloadThresholdAmount;

        public decimal ReloadAmount;

    }

}