Cannot remove an Item from a C# list

I have a C# list of students. I cannot remove Item based on Id.

Program.cs

static void RemoveStudent(StudentManager studentManager)
{
    Console.WriteLine("Which student? Insert ID:");
    int id = Convert.ToInt32(Console.ReadLine());
    Console.WriteLine(id);
    studentManager.RemoveStudent(1);
}

How student class looks like:

public class Student
{
    public int Id { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
    public string Major { get; set; }
}

How StudentManagerClass looks like:

public class StudentManager
{
    private List<Student> students = new List<Student>();

    public void RemoveStudent(int id)
    {
        students.RemoveAt(id);
    }
   
    //...
}

Program exits without any prompt when trying to remove the element.

>Solution :

List.RemoveAt is documented to do the following:

Removes the element at the specified index of the List.

(emphasys in mine)

In your case id is not the index of the element, but rather the value of a specific field of it.

In order to remove an element by a given field, you can use List.RemoveAll which:

Removes all the elements that match the conditions defined by the specified predicate.

In this predicate you can compare the Id field to the one you want to remove:

//----------------------------vvvvvvvvvvvvvvvv--
students.RemoveAll(student => student.Id == id);