ScoreReport.cs

namespace Students
{
    class StudentDetails
    {
        private string _studName = "Alexander";
        private int _studId = 30;
        public StudentDetails()
        {
            Console.WriteLine("Student Name : " + _studName);
            Console.WriteLine("Student Id : " + _studId);
        }
    }

}
namespace Examination
{
    class ScoreReport
    {
        public string Subject = "Science";
        public int Marks = 60;

        static void Main(string[] args)
        {
            StudentDetails objStudents = new StudentDetails();
            ScoreReport objReport = new ScoreReport();

            Console.WriteLine("Subject: " + objReport.Subject);
            Console.WriteLine("Marks: " + objReport.Marks);
        }
    }
}