3. Linq操作符

public class Student{
    public int StudentID { get; set; }
    public string StudentName { get; set; }
    public int Age { get; set; }
}


IList<Student> studentList = new List<Student>() {
    new Student() { StudentID = 1, StudentName = "John" },
    new Student() { StudentID = 2, StudentName = "Moin" },
    new Student() { StudentID = 3, StudentName = "Bill" },
    new Student() { StudentID = 4, StudentName = "Ram" },
    new Student() { StudentID = 5, StudentName = "Ron" }
};

//只是查询姓名
var selectResult = from s in studentList
                   select s.StudentName;

IList<Student> studentList = new List<Student>() {
    new Student() { StudentID = 1, StudentName = "John", Age = 13 } ,
    new Student() { StudentID = 2, StudentName = "Moin",  Age = 21 } ,
    new Student() { StudentID = 3, StudentName = "Bill",  Age = 18 } ,
    new Student() { StudentID = 4, StudentName = "Ram" , Age = 20 } ,
    new Student() { StudentID = 5, StudentName = "Ron" , Age = 15 }
};

//这里面可以针对不同条件对数据做不同处理
// returns collection of anonymous objects with Name and Age property
var selectResult = from s in studentList
                   select new { Name = "Mr. " + s.StudentName, Age =s.Age==15?1:s.Age };

// iterate selectResult
foreach (var item in selectResult)
    Console.WriteLine("Student Name: {0}, Age: {1}", item.Name, item.Age);