DictinaryCommands

using System;
using System.Collections.Generic;
using System.Linq;

namespace _20._04._21
{
    class Program
    {
        static void Main(string[] args)
        {
            var students = new Dictionary<string, double>();

            students.Add("Георги", 3.5);
            students.Add("Стефан", 4.5);
            students.Add("Петър", 5);
            students.Add("Цветан", 3.25);
            students.Add("Христо", 4.75);
            students.Add("Йордан", 6);

            Console.WriteLine($"Dictionary size is: {students.Count}");

            Console.WriteLine($"Георги mark: {students["Георги"]:f2}");

            students.Remove("Цветан");
            Console.WriteLine($"Цветан removed");

            bool isTrue = students.ContainsKey("Йордан");
            Console.WriteLine($"Is contains Йордан: {isTrue}");

            foreach (var student in students)
            {
                Console.WriteLine($"Student Name: {student.Key}, Student Grade: {student.Value}");
            }

            students.Clear();
            Console.WriteLine($"Is Contains anything: {students.Any()}");
        }
    }
}