One91

 public static void Main(string[] args)  
     {  
       int i, j, k;  
       for (i = 1; i <= 7; i++)  
       {  
         for (j = 1; j <= i; ++j)  
           Console.Write(j);   
         for (k = 7 - i; k >= 1; k--)  
           Console.Write("*");  
         Console.Write("\n");  
       }  
       Console.ReadLine();  
     }