C# Function to Convert Number to Words

 public static string NumbersToWords(int inputNumber)  
   {  
     int inputNo = inputNumber;  
     if (inputNo == 0)  
       return "Zero";  
     int[] numbers = new int[4];  
     int first = 0;  
     int u, h, t;  
     System.Text.StringBuilder sb = new System.Text.StringBuilder();  
     if (inputNo < 0)  
     {  
       sb.Append("Minus ");  
       inputNo = -inputNo;  
     }  
     string[] words0 = {"" ,"One ", "Two ", "Three ", "Four ",  
       "Five " ,"Six ", "Seven ", "Eight ", "Nine "};  
     string[] words1 = {"Ten ", "Eleven ", "Twelve ", "Thirteen ", "Fourteen ",  
       "Fifteen ","Sixteen ","Seventeen ","Eighteen ", "Nineteen "};  
     string[] words2 = {"Twenty ", "Thirty ", "Forty ", "Fifty ", "Sixty ",  
       "Seventy ","Eighty ", "Ninety "};  
     string[] words3 = { "Thousand ", "Lakh ", "Crore " };  
     numbers[0] = inputNo % 1000; // units  
     numbers[1] = inputNo / 1000;  
     numbers[2] = inputNo / 100000;  
     numbers[1] = numbers[1] - 100 * numbers[2]; // thousands  
     numbers[3] = inputNo / 10000000; // crores  
     numbers[2] = numbers[2] - 100 * numbers[3]; // lakhs  
     for (int i = 3; i > 0; i--)  
     {  
       if (numbers[i] != 0)  
       {  
         first = i;  
         break;  
       }  
     }  
     for (int i = first; i >= 0; i--)  
     {  
       if (numbers[i] == 0) continue;  
       u = numbers[i] % 10; // ones  
       t = numbers[i] / 10;  
       h = numbers[i] / 100; // hundreds  
       t = t - 10 * h; // tens  
       if (h > 0) sb.Append(words0[h] + "Hundred ");  
       if (u > 0 || t > 0)  
       {  
         if (h > 0 || i == 0) sb.Append("and ");  
         if (t == 0)  
           sb.Append(words0[u]);  
         else if (t == 1)  
           sb.Append(words1[u]);  
         else  
           sb.Append(words2[t - 2] + words0[u]);  
       }  
       if (i != 0) sb.Append(words3[i - 1]);  
     }  
     return sb.ToString().TrimEnd();  
   }