C# 如何最好地将数组项的元素与用户输入进行比较

我正在收集3个用户输入，我想在这个数组上运行这些输入，然后返回指定的信息，还有2个用户输入，但我不想阻塞这个问题：

//variable to hold the return value from readline - set to 0
            int c1 = 0;
            //if that var is 0 go - do while loop - while var = 0  go
            if (c1 == 0)
            {
                while (c1 == 0)
                {
                    Console.WriteLine("Please enter a C# Course ID:\n 10 = Basic C# \n 11 = Advanced C# \n 12 = Complex C# \n Only the course ID is valid as an entry");
                    int ID;
                    //Readline - pass variable back for what was entered
                    bool isNumeric = int.TryParse(Console.ReadLine(), out ID);

                    //validation check as to what was entered ; i.e. >=10 <=12
                    if (ID == 10)
                    {
                        Console.WriteLine("You have chosen:\n 10 = Basic C#");
                        c1 = 10;
                    }
                    else if (ID == 11)
                    {
                        Console.WriteLine("You have chosen:\n 11 = Advanced C#");
                        c1 = 11;
                    }
                    else if (ID == 12)
                    {
                        Console.WriteLine("You have chosen:\n 12 = Complex C#");
                        c1 = 12;
                    }
                    //if var outside of range, hard set to 0
                    else if (ID >= 10 && ID <= 12)
                    {
                        Console.WriteLine("Enter a valid input between 10 and 12");
                    }
                }

课程班的设置如下：

public abstract class Courses
    {
        public DateTime CourseDate { get; set; }
        public int StreamID { get; private set; }
        public string CourseName { get; private set; }
        public int CourseID { get; private set; }
        public Courses(int courseID, int streamID, string courseName, DateTime courseDate)
        {
            this.CourseID = courseID;
            this.StreamID = streamID;
            this.CourseName = courseName;
            this.CourseDate = courseDate;
        }
    }

主要问题是如何将c1用户输入与数组项中的CourseID第一个数字进行比较。再一次，提前感谢，很抱歉有这么多问题

使用Linq：

var course = courses.SingleOrDefault(x => x.CourseID == c1);

if (course == null){
   // No course found
}

---

课程看起来像一个对象数组，所以为了清晰起见，我们当然需要知道这个类是什么样子的@ŇssaPøngjǣrdenlarp，我已经编辑了课程类结构

var course = courses.SingleOrDefault(x => x.CourseID == c1);

if (course == null){
   // No course found
}