Web Forms :: How To Search A Word For Spelling Correction In C#

How to search a word for spelling correction in c#. Below is the code which i used,

Its not working, for words less than three 5 letters.

public string _dictionary(string word)
{
string[] wordArray = new string[125896];
string reading;
int nwords = 0;
FileStream fs = new FileStream(@"C:Documents and Settingsharsha.limayeDesktopspelling.txt", FileMode.Open, FileAccess.Read);
StreamReader s = new StreamReader(fs);
while((reading=s.ReadLine())!=null)
{
if (reading == word)
return word;
char[] TextboxPos=reading.ToLower().ToCharArray();
char[] readingPos = new char[20];
readingPos = TextBox1.Text.ToLower().ToCharArray();
if (TextboxPos[0] == readingPos[0])
{
if(readingPos.Length<=5)
{
if (TextboxPos[1] == readingPos[1] && TextboxPos.Length-1 == readingPos.Length-1)//[readingPos.Length])// && TextboxPos[TextboxPos.Length-1] == readingPos[readingPos.Length - 1])
{
// return reading;
TextBox1.Text = "Search for " + reading + " instead of " + TextBox1.Text;
break;
}
}
else
{
if (TextboxPos[1] == readingPos[1]&& TextboxPos[2] == readingPos[2] && TextboxPos.Length == readingPos.Length && TextboxPos.Length-1 == readingPos.Length - 1&& TextboxPos.Length-2 == readingPos.Length - 2)
{
//return reading;
TextBox1.Text = "Search for" + reading + "instead of" + TextBox1.Text;
break;
}
}
}
wordArray[nwords] = reading;
nwords++;
}
fs.Close();
s.Close();
return reading;