C# HashSet類（復雜）對象的去重

    public class Student
    {
        public string Id { get; set; }
        public string Name { get; set; }

        public override bool Equals(object obj)
        {
            Student e = obj as Student;
            return this.Id == e.Id && this.Name == e.Name;
        }

        public override int GetHashCode()
        {
            return this.Id.GetHashCode() * 100 + this.Name.GetHashCode();
        }
    }

　　

        public static void Test()
        {
            var hashSetData = new HashSet<Student>();
            hashSetData.Add(new Student { Id = "001", Name = "張三" });
            hashSetData.Add(new Student { Id = "002", Name = "李四" });
            hashSetData.Add(new Student { Id = "001", Name = "張三" });
            hashSetData.Add(new Student { Id = "003", Name = "張三" });

            foreach (var item in hashSetData)
            {
                Console.WriteLine("Id:{0},Name:{1}", item.Id, item.Name);
            }
        }