C#程序不评估操作并返回错误的答案

我正在学习如何用C#编程.我写了这个小程序,它从用户那里获取名称,年龄,喜欢的颜色和两个数字.我使用记事本编写代码并从Windows命令提示符运行C#编译器.这是该程序的源代码

using System;

class ShowSomething
{
static void Main(string[] args)

{
    string name,age,favColor;
    int num1,num2,sum,mult,subs;
    float div;


    Console.Write("What is your name? ");
    name = Console.ReadLine();
    Console.WriteLine("Hello," + name);

    Console.WriteLine();

    Console.Write("How old are you? ");
    age = Console.ReadLine();
    Console.WriteLine("So you are " + age,"I thought that you were older!");

    Console.WriteLine();

    Console.Write("What is your favorite Color? ");
    favColor = Console.ReadLine();
    Console.WriteLine(favColor + " is a cool color!");

    Console.WriteLine();

    Console.WriteLine("Nice meeting you," + name,"Have a good day!");

    Console.WriteLine();

    Console.WriteLine("Let us do some operations," + name);

    Console.WriteLine();

    Console.Write("Please enter a number: ");
    num1 = Console.Read();

    Console.Write("Please enter another number: ");
    num2 = Console.Read();

    sum = num1 + num2;
    mult = num1 * num2;
    subs = num1 - num2;
    div = num1 / num2;


    Console.WriteLine();

    Console.WriteLine("Alright,"Let us blow up your mind!");

    Console.WriteLine();

    Console.WriteLine(num1 + "+" + num2,"=" + sum);
    Console.WriteLine(num1 + "*" + num2,"=" + mult);
    Console.WriteLine(num1 + "-" + num2,"=" + subs);
    Console.WriteLine(num1 + "/" + num2,"=" + div);

    Console.WriteLine();
    Console.WriteLine("Mindblown,Right?");
}   

}

当我执行程序时几乎一切都顺利.但是,当用户输入第一个操作数时,程序跳过第二个提示并打印出与预期结果完全不同的结果.例如,如果我将0作为第一个数字,程序将跳转到操作并打印以下内容：

//

48 13

48 * 13

48-13

48/13

精打细算,对吧？

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