/// <summary>
/// Create a character frequency dictionary given a string
/// </summary>
/// <param name="input"></param>
/// <returns>A dictionary with the key being characters in the input string and the values
/// being the number of times the character appears in the input string</returns>
public static CharacterFrequencyDictionary CreateDictionary(string input)
{
var dict = new CharacterFrequencyDictionary();
foreach (var c in input.ToCharArray())
{
if (!dict.ContainsKey(c))
{
dict.Add(c, 0);
}
dict[c]++;
}
return(dict);
}
