namespace Code.Core; public class Sprint { public int SprintNumber { get; set; } public DateTime StartDate { get; set; } public DateTime EndDate { get; set; } public bool IsActive { get; set; } = false; public List UserStories { get; set; } = new List(); public void MarkStoryDone(UserStory userStory) { var story = UserStories.First(x => x.Title == userStory.Title); story.IsComplete = true; } }