public static DateTime EasterSundayOf(int YearToCheck)
{
 int Y = YearToCheck;
 int a = Y % 19;
 int b = Y / 100;
 int c = Y % 100;
 int d = b / 4;
 int e = b % 4;
 int f = (b + 8) / 25;
 int g = (b - f + 1) / 3;
 int h = (19 * a + b - d - g + 15) % 30;
 int i = c / 4;
 int k = c % 4;
 int L = (32 + 2 * e + 2 * i - h - k) % 7;
 int m = (a + 11 * h + 22 * L) / 451;
 int Month = (h + L - 7 * m + 114) / 31;
 int Day = ((h + L - 7 * m + 114) % 31) + 1;
 DateTime dtEasterSunday = new DateTime(YearToCheck, Month, Day);
 return dtEasterSunday;
}