public void AddWord(IntellisenseItem word, string group)
{
foreach (List<IntellisenseItem> list in Enumerable.Select<string, List<IntellisenseItem>>((IEnumerable<string>) new List<string>(this.IgnoreCase ? WordMatcher.GetSubWord(word.FilterValue.ToLower()) : WordMatcher.GetSubWord(word.FilterValue))
{
group
}, new Func<string, List<IntellisenseItem>>(this.LookupOrAdd)))
{
if (Monitor.TryEnter((object) list))
{
try
{
if (!Enumerable.Contains<IntellisenseItem>((IEnumerable<IntellisenseItem>) list, word, (IEqualityComparer<IntellisenseItem>) this.intellisenseItemComparer))
list.Add(word);
}
finally
{
Monitor.Exit((object) list);
}
}
}
}
public void RemoveWord(IntellisenseItem word)
{
foreach (List<IntellisenseItem> list in Enumerable.Select<string, List<IntellisenseItem>>(Enumerable.Where<string>(WordMatcher.GetSubWord(word.FilterValue), (Func<string, bool>) (item => this.wordTree.ContainsKey(item))), (Func<string, List<IntellisenseItem>>) (item => this.wordTree[item])))
{
if (Monitor.TryEnter((object) list))
{
try
{
if (list.Contains(word))
list.Remove(word);
}
finally
{
Monitor.Exit((object) list);
}
}
}
}