ขอสอบถามเรื่อง Link List Visual C# หน่อย ครับ ว่าผม จะนำมาใช้กับโปรแกรของผมยังไง

    public class Plan
    {
        public int Month { get; set; }
        public DateTime PlanDate { get; set; }
        public string PlanDetail { get; set; }
    }

    var ls  = new List<Plan>();
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );
    ls.Add(new Plan {Month = xx ,  PlanDate = xx , PlanDetail = xx} );