One91

 public static void Main(string[] args)  
     {  
       int row, i, j, k;  
       Console.Write("Enter the no. of row you want to print: ");  
       row = Convert.ToInt32(Console.ReadLine());  
       for (i = 0; i <= row; i++)  
       {  
         k = 1;  
         for (j = i; j <= row - 1; j++)  
           Console.Write(" ");  
         for (j = 0; j <= i; j++)  
         {  
           Console.Write("{0} ", k);  
           k = (k * (i - j) / (j + 1));  
         }  
         Console.WriteLine();  
       }  
       Console.ReadLine();  
     }