Output Program

Question

I need to program that from Vulpes that general solution and  checking number of frequency on all steps correctly.(follow program is exclusive)
class Program{

   static void Main(){

      Dictionary<string, int> dict = new Dictionary<string, int>();

      string text = "The quick brown fox jumps over the quick lazy . dog and the quick brown cat.";

      text = text.ToLower();

      string[] sentences = text.Split(new char[]{'.'}, StringSplitOptions.RemoveEmptyEntries);
      // get all phrases in each sentence
      foreach(string sentence in sentences){

         string temp = sentence + " the";

         string[] words = temp.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);

         List<string> phrases = new List<string>();
         foreach(string word in words){            

            if (word == "the" || word == "and"){

               if (phrases.Count == 0) continue;

               string phrase = String.Join(" ", phrases.ToArray());

               if (!dict.ContainsKey(phrase)){

                  dict.Add(phrase, 1);

               }   else

               {  dict[phrase]++;

               }phrases.Clear();

            }else{phrases.Add(word);}

         }      

      }
      foreach(string key in dict.Keys) Console.WriteLine("{0} : {1}", key, dict[key]);
      Console.WriteLine();
      // now get all single word phrases

      dict.Clear();
      foreach(string sentence in sentences) {

         string[] words = sentence.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
         foreach(string word in words) {            

            if (word == "the" || word == "and") continue;

            if (!dict.ContainsKey(word)){

               dict.Add(word, 1);

            }else{

               dict[word]++; }

         }      

      }
      foreach(string key in dict.Keys) Console.WriteLine("{0} : {1}", key, dict[key]);
      Console.WriteLine();
      // now get all two word phrases

      dict.Clear();
      foreach(string sentence in sentences){

         string[] words = sentence.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
         for(int i = 0; i < words.Length - 1; i++){            

            if (words[i] == "the" || words[i] == "and") continue;

            if (words[i + 1] != "the" && words[i + 1] != "and"){

               string phrase = words[i] + " " + words[i + 1];  

               if (!dict.ContainsKey(phrase)){

                  dict.Add(phrase, 1);}

               else {

                  dict[phrase]++;}

            }

         }      

      }
      foreach(string key in dict.Keys) Console.WriteLine("{0} : {1}", key, dict[key]);
      Console.WriteLine();
      // now get all three word phrases

      dict.Clear();  

      foreach(string sentence in sentences){

         string[] words = sentence.Split(new char[]{' '}, StringSplitOptions.RemoveEmptyEntries);
         for(int i = 0; i < words.Length - 2; i++){            

            if (words[i] == "the" || words[i] == "and") continue;

            if (words[i + 1] != "the" && words[i + 1] != "and" && words[i + 2] != "the" && words[i + 2] != "and"){

               string phrase = words[i] + " " + words[i + 1] + " " + words[i + 2];  

               if (!dict.ContainsKey(phrase)) {

                  dict.Add(phrase, 1);}

               else{

                  dict[phrase]++;

               }

            }

         }      

      }
      foreach(string key in dict.Keys) Console.WriteLine("{0} : {1}", key, dict[key]);

   Console.ReadKey();           

 }

}