public static void Main()
{
var students = new Student[]
{
new Student { FirstName ="Sylvester", LastName = "Stallone", Age = 18 },
new Student { FirstName = "Jason", LastName = "Statham", Age = 10 },
new Student { FirstName = "Jean-Claude", LastName = "Van Damme", Age = 20 },
new Student { FirstName = "Jet", LastName = "Li", Age = 22 },
new Student { FirstName = "Dolph", LastName = "Lundgren", Age = 50 },
new Student { FirstName = "Chuck", LastName = "Norris", Age = 70 },
new Student { FirstName = "Bruce", LastName = "Willis", Age = 24 },
new Student { FirstName = "Arnold", LastName = "Schwarzenegger", Age = 55 },
new Student { FirstName = "Bruce", LastName = "Lee", Age = 35 },
new Student { FirstName = "Jason", LastName = "Bateman", Age = 44 }
};
Console.WriteLine("All students whose first name is before its last name alphabetically:");
AlphabeticallySearch(students);
Console.WriteLine();
Console.WriteLine("The first name and last name of all students with age between 18 and 24:");
AgedSearch(students);
Console.WriteLine();
Console.WriteLine("Sorted by first name and last name in descending order with lambda expressions:");
DescendingOrderLambda(students);
Console.WriteLine();
Console.WriteLine("Sorted by first name and last name in descending order with LINQ:");
DescendingOrderLINQ(students);
}
static void DescendingOrderLambda(Student[] students)
{
var lambdaOrder = students.OrderBy(Student => Student.FirstName).ThenBy(Student => Student.LastName).Reverse();
foreach (var student in lambdaOrder)
{
Console.WriteLine("{0} {1}", student.FirstName, student.LastName);
}
}
static void AlphabeticallySearch(Student[] students)
{
var theChosenOnes =
from student in students
where student.FirstName.CompareTo(student.LastName) < 0
select student;
foreach (var student in theChosenOnes)
{
Console.WriteLine("{0} {1}", student.FirstName, student.LastName);
}
}
static void AgedSearch(Student[] students)
{
var selectedStudents =
from student in students
where (student.Age >= 18 && student.Age <= 24)
select student;
foreach (var student in selectedStudents)
{
Console.WriteLine("{0} {1}", student.FirstName, student.LastName);
}
}
static void DescendingOrderLINQ(Student[] students)
{
var linqOrder =
from student in students
orderby student.FirstName descending, student.LastName descending
select student;
foreach (var student in linqOrder)
{
Console.WriteLine("{0} {1}", student.FirstName, student.LastName);
}
}
