Readme.md

Common Type System

1. Define a class Student, which contains data about a student – first, middle and last name, SSN, permanent address, mobile phone e-mail, course, specialty, university, faculty. Use an enumeration for the specialties, universities and faculties. Override the standard methods, inherited by System.Object: Equals(), ToString(), GetHashCode() and operators == and !=.
2. Add implementations of the ICloneable interface. The Clone() method should deeply copy all object's fields into a new object of type Student.
3. Implement the IComparable<Student> interface to compare students by names (as first criteria, in lexicographic order) and by social security number (as second criteria, in increasing order).
4. Create a class Person with two fields – name and age. Age can be left unspecified (may contain null value. Override ToString() to display the information of a person and if age is not specified – to say so. Write a program to test this functionality.
5. Define a class BitArray64 to hold 64 bit values inside an ulong value. Implement IEnumerable<int> and Equals(…), GetHashCode(), [], == and !=.
6. * Define the data structure binary search tree with operations for "adding new element", "searching element" and "deleting elements". It is not necessary to keep the tree balanced. Implement the standard methods from System.Object – ToString(), Equals(…), GetHashCode() and the operators for comparison == and !=. Add and implement the ICloneable interface for deep copy of the tree. Remark: Use two types – structure BinarySearchTree (for the tree) and class TreeNode (for the tree elements). Implement IEnumerable<T> to traverse the tree.