practice/FiveLetters/Model/FiveLettersTask.cs

using System;

namespace FiveLetters.Model
{
    public class FiveLettersTask
    {
        public DateTime Date { get; set; }
        public string TaskGuid { get; set; }
        public string Word { get; set; }

        public FiveLettersTask(DateTime date, string word)
        {
            Date = date;
            Word = word;
            TaskGuid = Guid.NewGuid().ToString("N");
        }
    }
}