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// default value of boolean is false bool b; //default value of nullable boolean is null bool? z; b = true; if(b) { Console.WriteLine("Boolean has true value"); } The bool keyword is an alias of System.Boolean. It is used to declare variables to store the Boolean values, true...

public class Person { //Id property can be read by other classes, but only set by the Person class public int Id {get; private set;} //Name property can be retrieved or assigned public string Name {get; set;} private DateTime dob; //Date of Birth property is st...

Getters are used to expose values from classes. string name; public string Name { get { return this.name; } }

Setters are used to assign values to properties. string name; public string Name { set { this.name = value; } }

public class Model { public string Name { get; set; } public bool? Selected { get; set; } } Here we have a Class with no constructor with two properties: Name and a nullable boolean property Selected. If we wanted to initialize a List<Model>, there are a few different ways to ex...

var zipcode = myEmployee?.Address?.ZipCode; //returns null if the left operand is null. //the above is the equivalent of: var zipcode = (string)null; if (myEmployee != null && myEmployee.Address != null) zipcode = myEmployee.Address.ZipCode;

var age = GetAge(dateOfBirth); //the above calls the function GetAge passing parameter dateOfBirth.

var letters = null; char? letter = letters?[1]; Console.WriteLine("Second Letter is {0}",letter); //in the above example rather than throwing an error because letters is null //letter is assigned the value null

Deprecated usage The ConfigurationSettings class was the original way to retrieve settings for an assembly in .NET 1.0 and 1.1. It has been superseded by the ConfigurationManager class and the WebConfigurationManager class. If you have two keys with the same name in the appSettings section of the ...

The ConfigurationManager class supports the AppSettings property, which allows you to continue reading settings from the appSettings section of a configuration file the same way as .NET 1.x supported. app.config <?xml version="1.0" encoding="utf-8"?> <configuration&gt...

Visual Studio helps manage user and application settings. Using this approach has these benefits over using the appSettings section of the configuration file. Settings can be made strongly typed. Any type which can be serialized can be used for a settings value. Application settings can be...

Starting from a new Settings class and custom configuration section: Add an application setting named ExampleTimeout, using the time System.Timespan, and set the value to 1 minute: Save the Project Properties, which saves the Settings tab entries, as well as re-generates the custom Settings cl...

var collection = new BlockingCollection<int>(5); var random = new Random(); var producerTask = Task.Run(() => { for(int item=1; item<=10; item++) { collection.Add(item); Console.WriteLine("Produced: " + item); Thread.Sleep(random.Next(1...

var tasks = Enumerable.Range(1, 5).Select(n => new Task<int>(() => { Console.WriteLine("I'm task " + n); return n; })).ToArray(); foreach(var task in tasks) task.Start(); Task.WaitAll(tasks); foreach(var task in tasks) Console.WriteLine(task.Result); ...

var task1 = Task.Run(() => { Console.WriteLine("Task 1 code starting..."); throw new Exception("Oh no, exception from task 1!!"); }); var task2 = Task.Run(() => { Console.WriteLine("Task 2 code starting..."); throw new Exception("Oh ...

var task1 = Task.Run(() => { Console.WriteLine("Task 1 code starting..."); throw new Exception("Oh no, exception from task 1!!"); }); var task2 = Task.Run(() => { Console.WriteLine("Task 2 code starting..."); throw new Exception("Oh ...

var cancellationTokenSource = new CancellationTokenSource(); var cancellationToken = cancellationTokenSource.Token; var task = new Task((state) => { int i = 1; var myCancellationToken = (CancellationToken)state; while(true) { Console.Write...

The enum keyword tells the compiler that this class inherits from the abstract class Enum, without the programmer having to explicitly inherit it. Enum is a descendant of ValueType, which is intended for use with distinct set of named constants. public enum DaysOfWeek { Monday, Tuesday, ...

Structs inherit from System.ValueType, are value types, and live on the stack. When value types are passed as a parameter, they are passed by value. Struct MyStruct { public int x; public int y; } Passed by value means that the value of the parameter is copied for the method, and any...

An enum is a special type of class. The enum keyword tells the compiler that this class inherits from the abstract System.Enum class. Enums are used for distinct lists of items. public enum MyEnum { Monday = 1, Tuesday, Wednesday, //... } You can think of an enum as a conve...