List<Employee> employee = new List<Employee>{
                new Employee{ID = 1,Name = "aaa",City = "x",Address = "ding",Value =100},
                 new Employee{ID = 2,Name = "bbb",City = "y",Address = "dang",Value =200},
                  new Employee{ID = 3,Name = "ccc",City = "z",Address = "kacha",Value =300},
            new Employee{ID = 4,Name = "ddd",City = "y",Address = "wag",Value =200},
                  new Employee{ID = 5,Name = "eee",City = "z",Address = "ping",Value =300}
            };

            var query = employee.Where(x=> x.Address.StartsWith("d") || x.Value == 300);
            var query1 = employee.Where(x => x.Address.StartsWith("d")).Union(employee.Where(x => x.Value == 300));
       

            foreach (var q in query)
            {
                Console.Write(q.Name.ToString() + "\r\n");
            }
            Console.WriteLine("-----------");
            foreach (var q in query1)
            {
                Console.Write(q.Name.ToString() + "\r\n");
            }

------解决方案--------------------
不明白啥意思

------解决方案--------------------

http://topic.csdn.net/u/20080912/10/2CBCF3AF-9AD7-42D4-BD16-2EA9B6E189AF.html