c# - Check if date exist in list of dates -

how can compare mounth , day (not year) list of dates?

 datetime[] dates= new datetime[]                 {                     new datetime(datetime.now.year, 1, 1),                      new datetime(datetime.now.year, 5, 1),                      new datetime(datetime.now.year, 5, 8)                 }; // result datetime date_1 = new datetime(2016, 1, 1); // ok datetime date_2 = new datetime(2022, 1, 1); // ok datetime date_3 = new datetime(2016, 1, 2); // ko datetime date_4 = new datetime(2016, 1, 3); // ko 

you use ienumerable extension any check if array contains date required month , day

datetime date_1 = new datetime(2016, 1, 1);  bool exist = dates.any (d => d.month == date_1.month && d.day == date_1.day); console.writeline(exist);  datetime date_3 = new datetime(2016, 1, 2);  exist = dates.any (d => d.month == date_3.month && d.day == date_3.day); console.writeline(exist); 

of course requires using system.linq