using System;
using System.Security.Cryptography;

class MainClass {
    public static void Main() {
        byte[] number = new byte[32];
        RandomNumberGenerator rng = RandomNumberGenerator.Create();
        rng.GetBytes(number);

        Console.WriteLine(BitConverter.ToString(number));

    }
}
           
          

   
 
using System;
using System.Drawing;
using System.Windows.Forms;
   
class RandomRectangle: Form
{
     public static void Main()
     {
          Application.Run(new RandomRectangle());
     }
     public RandomRectangle()
     {
          Text = "Random Rectangle";
   
          Timer timer    = new Timer();
          timer.Interval = 1;
          timer.Tick    += new EventHandler(TimerOnTick);
          timer.Start();
     }
     void TimerOnTick(object obj, EventArgs ea)
     {
          Random rand = new Random();
   
          int x1 = rand.Next(ClientSize.Width);
          int x2 = rand.Next(ClientSize.Width);
          int y1 = rand.Next(ClientSize.Height);
          int y2 = rand.Next(ClientSize.Height);
   
          Color color = Color.FromArgb(rand.Next(256), 
                                       rand.Next(256), 
                                       rand.Next(256));
   
          Graphics grfx = CreateGraphics();
          grfx.FillRectangle(new SolidBrush(color), 
                             Math.Min(x1,  x2), Math.Min(y1,  y2),
                             Math.Abs(x2 - x1), Math.Abs(y2 - y1));
          grfx.Dispose();
     }
}

    

using System;

public class RollDie
{
public static void Main( string[] args )
{
Random randomNumbers = new Random();

int frequency1 = 0;
int frequency2 = 0;
int frequency3 = 0;
int frequency4 = 0;
int frequency5 = 0;
int frequency6 = 0;

int face;

for ( int roll = 1; roll <= 6000; roll++ ) { face = randomNumbers.Next( 1, 7 ); switch ( face ) { case 1: frequency1++; break; case 2: frequency2++; break; case 3: frequency3++; break; case 4: frequency4++; break; case 5: frequency5++; break; case 6: frequency6++; break; } } Console.WriteLine( "Face Frequency" ); // output headers Console.WriteLine( "1 {0} 2 {1} 3 {2} 4 {3} 5 {4} 6 {5}", frequency1, frequency2, frequency3, frequency4, frequency5, frequency6 ); } } [/csharp]

using System;

public class RandomIntegers
{
public static void Main( string[] args )
{
Random randomNumbers = new Random();
int face;

for ( int counter = 1; counter <= 20; counter++ ) { face = randomNumbers.Next( 1, 7 ); Console.Write( "{0} ", face ); if ( counter % 5 == 0 ) Console.WriteLine(); } } } [/csharp]

   
 
using System;

class CondOpApp {
    [STAThread]
    static void Main(string[] args) {
        Random rand = new Random();
        int a = 0, b = 0;

        for (int i = 0; i < 5; i++) {
            a = rand.Next() % 100;
            b = rand.Next() % 100;

            Console.WriteLine("a={0}, b={1}, so the winner is: {2}", a, b, a > b ? &#039;a&#039; : &#039;b&#039;);
        }
    }
}

    

   
 
using System;
using System.Diagnostics;

class MainClass
{
    public static void Main()
    {
        ProcessStartInfo startInfo = new ProcessStartInfo();
        startInfo.FileName = "notepad.exe";
        startInfo.Arguments = "file.txt";
        startInfo.WorkingDirectory = @"C:Temp";
        startInfo.WindowStyle = ProcessWindowStyle.Maximized;
        startInfo.ErrorDialog = true;

        Process process;
        try
        {
            process = Process.Start(startInfo);
            Console.WriteLine("Waiting 30 seconds for process to finish.");
            if (process.WaitForExit(30000))
            {
                Console.WriteLine("Process terminated.");
            }
            else
            {
                Console.WriteLine("Timed out waiting for process to end.");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Could not start process.");
            Console.WriteLine(ex);
        }
    }
}

    

   
 

using System;
using System.Diagnostics;

class MainClass
{
    public static void Main()
    {
        ProcessStartInfo startInfo = new ProcessStartInfo();
        startInfo.FileName = "notepad.exe";
        startInfo.Arguments = "file.txt";
        startInfo.WorkingDirectory = @"C:Temp";
        startInfo.WindowStyle = ProcessWindowStyle.Maximized;
        startInfo.ErrorDialog = true;

        Process process;
        try
        {
            process = Process.Start(startInfo);
            Console.WriteLine("Waiting 30 seconds for process to finish.");
            if (process.WaitForExit(30000))
            {
                Console.WriteLine("Process terminated.");
            }
            else
            {
                Console.WriteLine("Timed out waiting for process to end.");
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Could not start process.");
            Console.WriteLine(ex);
        }
    }
}