我是C#的初学者，我想创建一个简单的计算器。我已经写了所有的代码，它没有显示任何错误，然而，它没有显示它正确。这是我正在使用的全部代码:

using System;
namespace C_
{
    class Program
    {
        static void Main(string[] args)
        {
           Console.Title = "Calculator"; 

            float num1;
            float num2;
            float resultSum;
            float resultSub;
            float resultProd;
            float resultDiv;


            Console.Write("Enter your first number ");
             
            num1 = Convert.ToInt32(Console.Read());
            num2 = Convert.ToInt32(Console.Read());

            resultSum = num1 + num2;
            Console.Write("The sum is " + resultSum);

            resultSub = num1 - num2;
            Console.Write("The differnce is " + resultSub);

            resultProd = num1 * num2;
            Console.Write("The product is " + resultProd);

            resultDiv = num1 / num2;
            Console.Write("The quotient is " + resultDiv);


            Console.ReadKey();
        }
            
    }
}

当我在不调试的情况下运行该程序时，控制台显示如下: