static void Main(string[] args) { //This is the main Class from which every class objects are created Console.WriteLine("Enter 1 for UnOrderedList.\nEnter 2 for OrderedList " + "\n" + "Enter 3 for BalancedParantheses \n" + "Enter 4 for CashCounter \n" + "Enter 5 for PalidromeCheck \n" + "Enter 6 for BinarySearchTree \n" + "Enter 7 for HashFunction\n" + "Enter 8 for PrimeNumber2Dimension \n" + "Enter 9 for Anagrams in array\n" + "Enter 10 for AnagranToStack\n" + "Enter 11 for AnagranToQue\n" + "Enter 12 for Calender"); int number = int.Parse(Console.ReadLine()); //by using a static method called DriverMethod to invoke the particular class switch (number) { case 0: new Test(); break; case 1: ReadFromFile.DriverMethod(); break; case 2: FileReader.DriverMethod(); break; case 3: BalancedParentheses.DriverMethod(); break; case 4: new CashCounter(); break; case 5: PalindromeChecker.DriverMethod(); break; case 6: BinarySearchTree.DriverMethod(); break; case 7: HashTable.DriverMethod(); break; case 8: PrimeNumber2Dimension.DriverMethod(); break; case 9: Anagram.DriverMethod(); break; case 10: AnagramToStack.DriverMethod(); break; case 11: AnagramToQue.DriverMethod(); break; case 12: Calender.DriverMethod(); break; default: Console.WriteLine("invalid Entry");; break; } }