how to convert amount number to text format in c#

protected void Page_Load(object sender, EventArgs e)
{
string sdfdsf = retWord(545150569);
}

public string retWord(int number)

{

if (number == 0)

return "Zero";

if (number == -2147483648) return "Minus Two Hundred and Fourteen Crore Seventy Four Lakh Eighty Three Thousand Six Hundred and Forty Eight";

int[] num = new int[4];

int first = 0;

int u, h, t;

System.Text.StringBuilder sb = new System.Text.StringBuilder();

if (number < 0)

{

sb.Append("Minus ");

number = -number;

}

string[] words0 = { "", "One ", "Two ", "Three ", "Four ", "Five ", "Six ", "Seven ", "Eight ", "Nine " };

string[] words = { "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 " };

num[0] = number % 1000; // units

num[1] = number / 1000;

num[2] = number / 100000;

num[1] = num[1] - 100 * num[2]; // thousands

num[3] = number / 10000000; // crores

num[2] = num[2] - 100 * num[3]; // lakhs



for (int i = 3; i > 0; i--)

{

if (num[i] != 0)

{

first = i;

break;

}

}

for (int i = first; i >= 0; i--)

{

if (num[i] == 0) continue;

u = num[i] % 10; // ones

t = num[i] / 10;

h = num[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(words[u]);

else

sb.Append(words2[t - 2] + words0[u]);

}

if (i != 0) sb.Append(words3[i - 1]);

}

return sb.ToString().TrimEnd();

}
}