Parallel.For loop for spell checking using NHunspell and c#

Parallel.For loop for spell checking using NHunspell and c#

I have a list of string and if I run spell checking using NHunspell in
sequential manner then everything works fine; but if I use Parallel.For
loop against the List the application stops working in the middle( some
address violation error )
public static bool IsSpellingRight(string inputword, byte[] frDic, byte[]
frAff, byte[] enDic, byte[] enAff)
{
if (inputword.Length != 0)
{
bool correct;
if (IsEnglish(inputword))
{
using (var hunspell = new Hunspell(enAff, enDic))
{
correct = hunspell.Spell(inputword);
}
}
else
{
using (var hunspell = new Hunspell(frAff, frDic))
{
correct = hunspell.Spell(inputword);
}
}
return correct ;
}
return false;
}
Edit:
var tokenSource = new CancellationTokenSource();
CancellationToken ct = tokenSource.Token;
var poptions = new ParallelOptions();
// Keep one core/CPU free...
poptions.MaxDegreeOfParallelism = Environment.ProcessorCount - 1;
Task task = Task.Factory.StartNew(delegate
{
Parallel.For(0, total, poptions, i =>
{
if (words[i] != "")
{
_totalWords++;
if (IsSpellingRight(words[i],dictFileBytes,
affFileBytes,dictFileBytesE,affFileBytesE))
{
// do something
}
else
{
BeginInvoke((Action) (() =>
{
//do something on UI thread
}));
}
}
});
}, tokenSource.Token);
task.ContinueWith((t) => BeginInvoke((Action) (() =>
{
MessaageBox.Show("Done");
})));