A c# class that represents a date range data structure.

DateRange.cs

using System;
using System.Collections;
using System.Collections.Generic;

namespace Utils
{
    /// <summary>
    ///     Represents a range of dates.
    /// </summary>
    public struct DateRange : IEnumerable<DateTime>
    {
        /// <summary>
        ///     Initializes a new instance of the <see cref="DateRange" /> structure to the specified start and end date.
        /// </summary>
        /// <param name="startDate">First date in the date range.</param>
        /// <param name="endDate">Last date in the date range.</param>
        public DateRange(DateTime startDate, DateTime endDate)
        {
            Start = startDate;
            End = endDate;
        }

        /// <summary>
        ///     Gets the start date component of the date range.
        /// </summary>
        public DateTime Start { get; private set; }


        /// <summary>
        ///     Gets the end date component of the date range.
        /// </summary>
        public DateTime End { get; private set; }

        /// <summary>
        //     Returns an enumerator that iterates through the collection.
        /// </summary>
        /// <returns></returns>
        public IEnumerator<DateTime> GetEnumerator()
        {
            for (DateTime date = Start; date <= End; date = date.AddDays(1))
            {
                yield return date;
            }
        }

        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
        IEnumerator IEnumerable.GetEnumerator()
        {
            return GetEnumerator();
        }

        /// <summary>
        ///     Gets the number of whole days in the date range.
        /// </summary>
        public int Days
        {
            get { return (End - Start).Days + 1; }
        }
    }
}