Pascal'sTriangle.cs

// An example about jagged array
static void Main() 
  { 
    const int HEIGHT = 12; 
 
    // Allocate the array in a triangle form 
    long[][] triangle = new long[HEIGHT + 1][]; 
 
    for (int row = 0; row < HEIGHT; row++) 
     { 
       triangle[row] = new long[row + 1]; 
     } 
     // Calculate the Pascal's triangle 
     triangle[0][0] = 1; 
    for (int row = 0; row < HEIGHT - 1; row++) 
    { 
      for (int col = 0; col <= row; col++) 
      { 
        triangle[row + 1][col] += triangle[row][col]; 
        triangle[row + 1][col + 1] += triangle[row][col]; 
      }  
    } 
      // Print the Pascal's triangle 
     for (int row = 0; row < HEIGHT; row++) 
     { 
       Console.Write("".PadLeft((HEIGHT - row) * 2)); 
       for (int col = 0; col <= row; col++) 
        { 
         Console.Write("{0,3} ", triangle[row][col]); 
        } 
       Console.WriteLine(); 
     }
     Console.ReadKey();       
    }