Random paragraphs

It is possible to generate random paragraphs and sentences. The text must look like regular English writing. A C# method can generate language that appears natural.

This code can be used for testing or debugging purposes. It is also an interesting exercise in how to create random sequences of data.

Example

This class contains the logic for the random text generator. It has an AddContentParagraphs method. And we can fetch the resulting string from the Content property.

using System;
using System.Text;

class RandomText
{
    static Random _random = new Random();
    StringBuilder _builder;
    string[] _words;

    // Part 1: the constructor.
    public RandomText(string[] words)
    {
        _builder = new StringBuilder();
        _words = words;
    }

    public void AddContentParagraphs(int numberParagraphs, int minSentences,
        int maxSentences, int minWords, int maxWords)
    {
        // Part 2: call Next() on random number generator for each paragraph.
        for (int i = 0; i < numberParagraphs; i++)
        {
            AddParagraph(_random.Next(minSentences, maxSentences + 1),
                         minWords, maxWords);
            _builder.Append("\n\n");
        }
    }

    void AddParagraph(int numberSentences, int minWords, int maxWords)
    {
        // Part 3: call AddSentence repeatedly in AddParagraph.
        for (int i = 0; i < numberSentences; i++)
        {
            int count = _random.Next(minWords, maxWords + 1);
            AddSentence(count);
        }
    }

    void AddSentence(int numberWords)
    {
        // Part 4: generate a single sentence.
        StringBuilder b = new StringBuilder();
        // Add n words together.
        for (int i = 0; i < numberWords; i++) // Number of words
        {
            b.Append(_words[_random.Next(_words.Length)]);
            b.Append(' ');
        }
        string sentence = b.ToString().Trim() + ". ";
        // Uppercase sentence.
        sentence = char.ToUpper(sentence[0]) + sentence.Substring(1);
        // Add this sentence to the class.
        _builder.Append(sentence);
    }

    public string Content
    {
        get
        {
            return _builder.ToString();
        }
    }
}

class Program
{
    static void Main()
    {
        // Part 5: create a RandomText instance and generate text with it.
        string[] words = { "cat", "house", "man", "the", "for",
            "and", "a", "with", "bird", "fox" };
        RandomText text = new RandomText(words);
        text.AddContentParagraphs(2, 2, 4, 5, 12);
        string content = text.Content;
        Console.WriteLine(content);
    }
}
For bird house a house fox cat. House the the man a a bird cat a man for cat.

Bird fox for for the a with a cat man. A with the fox cat with bird house.

Summary

The class uses object-oriented design methodology and outputs variable-length sentences and paragraphs. We can specify any number of possible words.