static void Main(string[] args) { //fiels SampleFiless fs = new SampleFiless(); fs.WriteTextToFile("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt" + "hello"); fs.AppendToFile("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt" + "\nAppending"); string[] fileLines = fs.ReadAllLines("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt"); string fileContent = fs.ReadAllText("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt"); try { File.Copy("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt", "C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\2.txt"); } catch (System.IO.IOException e) { Console.WriteLine(e.GetType()); if (e.Message.Contains("already exists")) { Console.WriteLine("Please choose a different file name"); } try { throw new ArithmeticException(); } catch { Console.WriteLine("We have never dealt with this kind of exception, we are investigating into it, Arithmetic"); } } catch (Exception e) { Console.WriteLine("We have never dealt with this kind of exception, we are investigating into it"); } finally { Console.WriteLine("Mandatory code to be executed"); } File.Delete("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt"); File.Delete("C:\\Users\\Lakshmi\\Desktop\\SampleFiles\\1.txt"); foreach (string samplestring in fileLines) { Console.WriteLine(samplestring); } Console.WriteLine(fileContent); //colection SampleCollection ps = new SampleCollection(); Console.WriteLine("Please enter the number till which you want what type of numbers"); string typeofNumber = Console.ReadLine(); Console.WriteLine("Please enter the number till which you want Even numbers"); List <int> pn = ps.GetNumbers(Convert.ToInt32(Console.ReadLine()), typeofNumber); Console.WriteLine("myNumbers"); foreach (int evenNumber in pn) { Console.WriteLine(evenNumber); } // condition ConditionSample cs = new ConditionSample(); cs.Conditoins(); //switchs Switchssample sw = new Switchssample(); sw.Switchs(); //Arrays SampleArrays sa = new SampleArrays(); sa.Arrayss(); //while ita WhileIteration wi = new WhileIteration(); wi.MainMenu(); //Colletion SampleCollection cse = new SampleCollection(); Console.WriteLine("Please enter the number till which you want prime numbers"); pn = cse.GetPrimeNumbers(Convert.ToInt32(Console.ReadLine())); foreach (int primeNumber in pn) { Console.WriteLine(primeNumber); } }