title: Random number generating loop generates the same number
body: <p>I am still new to C# and I am trying to build a short program that simulates flipping a coin <em>X</em> number of times:</p>
  
  <pre><code>        // Declarations
          int headCount = 0;
          int tailCount = 0;
  
          // Main Program Logic
          Console.WriteLine("Press enter to begin");
          Console.ReadLine();
          for (int x = 1; x &lt;= 25; x++)
          {
              Random rnd = new Random();
              int flip = rnd.Next(1, 3);
              if (flip == 1)
              {
                  Console.WriteLine("Heads");
                  headCount++;
              }
              else
              {
                  Console.WriteLine("Tails");
                  tailCount++;
              }
          }
          Console.WriteLine("Heads came up {0} times.", headCount);
          Console.WriteLine("Tails came up {0} times.", tailCount);
          if (headCount &gt; tailCount)
          {
              Console.WriteLine("Heads wins.");
          }
          else
          {
              Console.WriteLine("Tails wins.");
          }
  
          // END OF DOCUMENT
          Console.ReadLine();
      }
  </code></pre>
  
  <p>Now, I am confident that my code is solid, however, I encounter a problem when I run the program. In the code above, the idea is that each time the for loop is executed that a new random number (either 1 or 2) is generated. In reality, 9 times out of ten, it generates one number the first time and then uses that number for the rest of the loop's executions.</p>
  
  <p>Everyone once in a while, the results are about 50/50 (what you would statistically expect), but usually it is just the same result repeated 25 times.</p>
  
  <p>Note that I declare the flip variable inside the loop. I have moved it back and forth from in the loop and just before the loop and the changes seem to not have any effect.</p>
  
  <p>Am I doing something wrong or does C# like to throw out statistical anomalies?</p>