Dictionaries_DisplayCount_DisplayKeysOfDict

Dictionary<string, List<double>> studentRecords = new Dictionary<string, List<double>>();
            studentRecords["Angel"] = new List<double>();
            studentRecords["Angel"].Add(5.50);
            studentRecords["Angel"].Add(4.75);
            studentRecords["Angel"].Add(5.25);
            studentRecords["Bogomil"] = new List<double>();
            studentRecords["Bogomil"].Add(5.57);

            Console.WriteLine(studentRecords.Count()); //Displays the number of KeyValuePairs ——> here now 2
            //Down: Way 1 to display only the Keys in a Dict:
            foreach(var keyValuePair in studentRecords)
            {
                Console.WriteLine(keyValuePair.Key);//Displays only the Keys in a Dictionary (Way 1)
            }

            //Down: Way 2 to display only the Keys in a Dict:
            var keys = studentRecords.Keys;//Collection of the existing Keys in a Dictionary (Way 2)
            foreach(var key in keys)
            {
                Console.WriteLine(key); // Displays only the keys
            }

            //Down: Way 3 to Display the Keys in a Dict
            var listOfKeys = new List<string>();
            foreach(var kVP in studentRecords)
            {
                listOfKeys.Add(kVP.Key); //Adds only the Keys to a List
            }
            Console.Write(string.Join(", ", listOfKeys));//Displays the Keys