using System;
   using System.Collections.Generic;
   
   class PascalTriangle
   {
      static void Main()
      {
         foreach (uint[] row in GetPascalTriangle())
         {
            Print(row);
            Console.ReadKey();
         }
      }
   
      static void Print(uint[] row)
      {
         foreach (uint e in row)
            Console.Write("{0}\t", e);
         Console.WriteLine();
      }
   
      static IEnumerable GetPascalTriangle()
      {
         uint[] row = new uint[1] { 1 };
   
         for(int n = 2; ; n++)
         {
            yield return row;
   
            uint[] nrow = new uint[n];
            Array.Copy(row, nrow, n-1);
            for (int i = 1; i < n; i++)
               nrow[i] += row[i-1];
            row = nrow;
         }
      }
   }