HttpClient is available through NuGet: Microsoft HTTP Client Libraries.
string requestUri = "http://www.example.com";
string responseData;
using (var client = new HttpClient())
{
using(var response = client.GetAsync(requestUri).Result)
{
response.EnsureSuccessStatus...
HttpClient is available through NuGet: Microsoft HTTP Client Libraries.
string requestUri = "http://www.example.com";
string requestBodyString = "Request body string.";
string contentType = "text/plain";
string requestMethod = "POST";
var request = new ...
var numbers = new[] {1,2,3,4,5};
var firstNumber = numbers.First();
Console.WriteLine(firstNumber); //1
var firstEvenNumber = numbers.First(n => (n & 1) == 0);
Console.WriteLine(firstEvenNumber); //2
The following throws InvalidOperationException with message "Sequence contain...
var numbers = new[] {1,2,3,4,5};
var lastNumber = numbers.Last();
Console.WriteLine(lastNumber); //5
var lastEvenNumber = numbers.Last(n => (n & 1) == 0);
Console.WriteLine(lastEvenNumber); //4
The following throws InvalidOperationException:
var lastNegativeNumber = numbers.Last(n...
const is used to represent values that will never change throughout the lifetime of the program. Its value is constant from compile-time, as opposed to the readonly keyword, whose value is constant from run-time.
For example, since the speed of light will never change, we can store it in a constan...
Cast is different from the other methods of Enumerable in that it is an extension method for IEnumerable, not for IEnumerable<T>. Thus it can be used to convert instances of the former into instances of the later.
This does not compile since ArrayList does not implement IEnumerable<T>:
...
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
class TcpChat
{
static void Main(string[] args)
{
if(args.Length == 0)
{
Console.WriteLine("Basic TCP chat");
Console.WriteLine();
...
using is syntactic sugar that allows you to guarantee that a resource is cleaned up without needing an explicit try-finally block. This means your code will be much cleaner, and you won't leak non-managed resources.
Standard Dispose cleanup pattern, for objects that implement the IDisposable interf...
The using static [Namespace.Type] directive allows the importing of static members of types and enumeration values. Extension methods are imported as extension methods (from just one type), not into top-level scope.
6.0
using static System.Console;
using static System.ConsoleColor;
using static ...
To make a class support collection initializers, it must implement IEnumerable interface and have at least one Add method. Since C# 6, any collection implementing IEnumerable can be extended with custom Add methods using extension methods.
class Program
{
static void Main()
{
va...
Backslash
// The filename will be c:\myfile.txt in both cases
string filename = "c:\\myfile.txt";
string filename = @"c:\myfile.txt";
The second example uses a verbatim string literal, which doesn't treat the backslash as an escape character.
Quotes
string text = "\&...
