WriteLine没有产生预期的结果

Question

这是我的计划：

using System;
using static System.Console;

class MoveEstimator
{

    static void Main(string[] args)
    {
        const double BASE_RATE = 250.00;
        const double HOUR_RATE = 150.00;
        const double COST_MILE = 2.00;
        string amtHoursAsString;
        double amtHours;
        string numMilesAsString;
        double numMiles;
        double totalOfMove;
        Write("Enter amount of hours >> ");
        amtHoursAsString = ReadLine();
        amtHours = Convert.ToDouble(amtHoursAsString);
        Write("Enter number of miles >> ");
        numMilesAsString = ReadLine();
        numMiles = Convert.ToDouble(numMilesAsString);
        totalOfMove = (amtHours * HOUR_RATE) + (numMiles * COST_MILE) + BASE_RATE;

        WriteLine( "Your estimated move cost is " + totalOfMove);
        return;

    }

}

它适用于输入，但程序在它给出输出之前关闭。你可以告诉我，我对此很新。我用一本书来学习它，所以我只想要一个入门级的答案，这样我才能顺利完成。我只需要知道我的WriteLine语句有什么问题。非常感谢你！