Что значит сей символ (=>)? - C#

//Статистика слов в документе
        private void task3()
        {
            List<WordInfo> allWords = new List<WordInfo>();
 
            string[] sybols = new string[] { " ", ",", ".", "!", "?", "\n", ":", "-", "\r", "\t", ";" };
 
            foreach (Word.Range word in Globals.ThisAddIn.Application.ActiveDocument.Words)
            {
                if (!sybols.Contains(word.Text))
                {
                    if(!allWords.Exists(w => w.text == word.Text))
                    {
                        allWords.Add(new WordInfo(word.Text));
                    }
                    else
                    {
                        allWords.Find(w => w.text == word.Text).count++;
                    }                          
                }
                   
            }
 
            allWords.OrderBy(w => w.text);
 
            foreach(var w in allWords)
            {
                Globals.ThisAddIn.Application.ActiveDocument.Content.InsertAfter("\n" + w.text + " - " + w.count.ToString());             
 
            }
 
            int count = 0;
 
            foreach (var w in allWords)
            {
                count += w.count;
            }
 
            Globals.ThisAddIn.Application.ActiveDocument.Content.InsertAfter("\nОбщее кол-во слов: " + count.ToString());
        }