C# How to fix error '' does not contain a constructor that takes 0 arguments

    public class SchoolClass
    {
        private int school_id;
        private string school_name;

        public int schoolID
        {
            get { return school_id; }
            set { school_id = value; }
        }
        public string SchoolName
        {
            get { return school_name; }
            set { school_name = value; }
        }
        public SchoolClass()
        {
            school_id = 0;
            school_name = string.Empty;
        }
        public SchoolClass(int id, string n)
        {
            school_id = id;
            school_name = n;
        }
    }


if code in red is missing then the following error will be displayed when executing the following code:
SchoolClass sc = new SchoolClass() { schoolID = 2, SchoolName = "some name" };