متد سازنده یا Constructor

    public class Student
    {
        public int StudentId { get; set; }
        public string StudentName { get; set; }
        public string StudentFamily { get; set; }


        public override string ToString()
        {
            return string.Format($"Id: {StudentId}\tName: {StudentName}\tFamily : {StudentFamily}");
        }
    }

    class Program
    {
        public static void Main(string[] args)
        {
            Student object1 = new Student();
        }
    }

Student object1 = new Student();

    public class Student
    {
        public int StudentId { get; set; }
        public string StudentName { get; set; }
        public string StudentFamily { get; set; }


        public override string ToString()
        {
            return string.Format($"Id: {StudentId}\tName: {StudentName}\tFamily : {StudentFamily}");
        }
    }

public class Student
{
    public int StudentId { get; set; }
    public string StudentName { get; set; }
    public string StudentFamily { get; set; }

    public Student()
    {

    }

    public override string ToString()
    {
        return string.Format($"Id: {StudentId}\tName: {StudentName}\tFamily : {StudentFamily}");
    }
}

public Student()
{

}

    public class Student
    {
        public int StudentId { get; set; }
        public string StudentName { get; set; }
        public string StudentFamily { get; set; }

        public Student()
        {

        }

        public Student(int StudentId)
        {
            this.StudentId = StudentId;
        }

        public Student(int StudentId,string StudentName)
        {
            this.StudentId = StudentId;
            this.StudentName = StudentName;
        }

        public Student(int StudentId, string StudentName, string StudentFamily)
        {
            this.StudentId = StudentId;
            this.StudentName = StudentName;
            this.StudentFamily = StudentFamily;
        }

        public override string ToString()
        {
            return string.Format($"Id: {StudentId}\tName: {StudentName}\tFamily : {StudentFamily}");
        }
    }

    class Program
    {
        public static void Main(string[] args)
        {
            Student object1 = new Student();

            Student object2 = new Student(1);

            Student object3 = new Student(1,"ali");

            Student object4 = new Student(1, "ali","moghadam jah");
        }
    }