using System; public class MainClass{ /// <summary> /// Gets the days between. /// </summary> /// <param name="first">The first.</param> /// <param name="last">The last.</param> /// <param name="inclusive">if set to <c>true</c> [inclusive].</param> /// <returns></returns> public static int GetDaysBetween(DateTime first, DateTime last, bool inclusive) { TimeSpan span = last - first; return inclusive ? span.Days + 1 : span.Days; } /// <summary> /// Gets the months between. /// </summary> /// <param name="first">The first.</param> /// <param name="last">The last.</param> /// <param name="inclusive">if set to <c>true</c> [inclusive].</param> /// <returns></returns> public static int GetMonthsBetween(DateTime first, DateTime last, bool inclusive) { int result = GetDaysBetween(first, last, true) / 30; return inclusive ? result + 1 : result; } }