public void ContainsTest()
 {
     for (int y = 1900; y < 2123; y++) {
         var yzd = new YearlyZmanimDictionary(y, CreateZmanim(y));
         Assert.IsTrue(yzd.Contains(yzd.ElementAt(321)));
         Assert.IsFalse(yzd.Contains(new KeyValuePair<DateTime, ZmanimInfo>(new DateTime(y - 1, 2, 28), null)));
         Assert.IsFalse(yzd.Contains(new KeyValuePair<DateTime, ZmanimInfo>(new DateTime(y, 2, 28), null)));
     }
 }
 public void ContainsTest()
 {
     for (int y = 1900; y < 2123; y++)
     {
         var yzd = new YearlyZmanimDictionary(y, CreateZmanim(y));
         Assert.IsTrue(yzd.Contains(yzd.ElementAt(321)));
         Assert.IsFalse(yzd.Contains(new KeyValuePair <DateTime, ZmanimInfo>(new DateTime(y - 1, 2, 28), null)));
         Assert.IsFalse(yzd.Contains(new KeyValuePair <DateTime, ZmanimInfo>(new DateTime(y, 2, 28), null)));
     }
 }