var list = new List<string>(); for (int i = 0; i < 12; i++) { list.Add($@"{DateTime.Today.AddHours(DateTime.Now.Hour - i)}:00"); }
var list = new List<string>(); for (int i = 0; i < 12; i++) { list.Add($@"{DateTime.Today.AddHours(DateTime.Now.Hour - i)}:00"); }