c# random kullanımı next vs

Random rnd=new Random();

Buradaki yarattığımız nesnenin adı rnd. Şimdi bu nesne üzerinden Random sınıfının metotlarına erişebileceğiz.

 int RastgeleSayi1=rnd.Next(10,20);
 int RastgeleSayi2=rnd.Next(50);
 int RastgeleSayi3=rnd.Next();
 double RastgeleSayi4=rnd.NextDouble();

Birinci örnekte: 10 ile 20 arasında int türden rastgele bir sayı üretilir, 10 dâhil ancak 20 dâhil değildir.
İkinci örnekte: 0 ile 50 arasında int türden rastgele bir sayı üretilir, 0 dâhil ancak 50 dâhil değildir.
Üçüncü örnekte: int türden pozitif herhangi bir sayı üretilir.
Dördüncü örnekte: double türden 0.0 ile 1 arasında rastgele bir sayı üretilir.

c# image download

You may use the following method to retrieve the image from a specific URL on the web. The below C# function takes an image url, download the image from the url as a stream.

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using System; using System.IO; using System.Net; using System.Threading; using System.Collections.Generic; using System.Linq; using System.Text.RegularExpressions;   namespace Rextester {     public class Program     {         public static void Main(string[] args)         {             string imageURL = "http://i1.wp.com/mplaza.pm/wordpress/wp-content/uploads/2015/09/output_RBPLdO.gif?w=676";               downloadImage(imageURL);             downloadImageAsync(imageURL);         }                  public static void downloadImage(string imageURL)         {                         using (WebClient webClient = new WebClient())             {                   var watch = System.Diagnostics.Stopwatch.StartNew();                                  byte [] data = webClient.DownloadData(imageURL);                                 using (MemoryStream imageData = new MemoryStream(data))                 {                    Console.WriteLine(imageData.Length + " bytes received");                 }                                  watch.Stop();                 Console.WriteLine("Total Execution Time :{0}", watch.ElapsedMilliseconds);                               }                   }                           public static void downloadImageAsync(string imageURL)         {                         using (WebClient webClient = new WebClient())             {                                                 webClient.DownloadDataCompleted += DownloadDataCompleted;                                  var watch = System.Diagnostics.Stopwatch.StartNew();                                 webClient.DownloadDataAsync(new Uri(imageURL));                                                                          while (webClient.IsBusy)                 {                     Console.WriteLine("\twaiting...");                     Thread.Sleep(10);                 }                 watch.Stop();                                  Console.WriteLine("Total Execution Time :{0}", watch.ElapsedMilliseconds);                               }         }                    public static void DownloadDataCompleted(object sender, DownloadDataCompletedEventArgs e)         {                      using (MemoryStream imageData = new MemoryStream(e.Result))            {                Console.WriteLine(imageData.Length + " bytes received");            }                   }             } }