AzamSharp

I was trying to find that if the Random Numbers being generated by the Random function are truly Random or not. So I wrote this small piece of code. When I debug the application it never goes into the else of the IsUnique method. But when I run this application "without debugging" it always print "This is not a random Number". Any ideas !

using System;
using System.Collections; 

namespace RandomNumberTest
{
	
	class Class1
	{
		private static ArrayList randomList = new ArrayList(); 
		private static int notRandom = 0; 
		
		[STAThread]
		static void Main(string[] args)
		{
			
			for(int i=0;i<=10;i++) 
			{
			CreateRandomNumber();
			}
			
		}

		static void CreateRandomNumber() 
		{
			Random d = new Random(); 
			int uniqueKey = d.Next(); 			
			
			IsUnique(uniqueKey); 
		}

		static void IsUnique(int uniqueKey) 
		{
			if( ! randomList.Contains((int) uniqueKey))
			{
				randomList.Add(uniqueKey); 
				Console.WriteLine(uniqueKey); 
			}
			else 
			{
				notRandom++; 
				Console.WriteLine("This is not a random Password:"+uniqueKey);
				Console.WriteLine("Total NOT RANDOM Numbers: "+notRandom); 
			}
		}
	}
}

This is a small piece of code that generates Random Passwords:

 

string alphabets = "abcdefghijklmnopqrstuvwxyz";
string numbers = "01234567890123456789012345";
StringBuilder password = new StringBuilder();
Random r = new Random();
for(int j=0; j<=20;j++)
{
for(int i=0;i<=5;i++)
{
password.Append(alphabets[r.Next(alphabets.Length)]);
password.Append(numbers[r.Next(numbers.Length)]);
}
Response.Write(password.ToString());
password.Remove(0,password.Length);

}