Sample LINQPad file for playing with the LINQ to Objects

Students.linq

public class Student
{
	public string Name;
	public string Teacher;
	public double Grade;
}

void Main()
{
    var a = new Student { Name = "Ioannis", Teacher = "Nikos", Grade = 3.0 };

	List<Student> students = new List<Student> {
		a,
		new Student { Name = "Ioannis", Teacher = "Nikos", Grade = 3.0 },
		new Student { Name = "Dionysis", Teacher = "Giannis", Grade = 3.9 },
		new Student { Name = "Christina", Teacher = "Nikos", Grade = 3.2 },
		new Student { Name = "Maria", Teacher = "Nikos", Grade = 4.3 },
		new Student { Name = "Nikos", Teacher = "Vicky", Grade = 2.3 },
		new Student { Name = "Dimitris", Teacher = "Giannis", Grade = 4.2 },
		new Student { Name = "Alexandros", Teacher = "Giannis", Grade = 2.9 },
		new Student { Name = "Andreas", Teacher = "Nikos", Grade = 5.0 },
		new Student { Name = "Panagiotis", Teacher = "Giannis", Grade = 4.4 },
		new Student { Name = "Giorgos", Teacher = "Giannis", Grade = 2.0 },
	};
	
	//IEnumerable<string> results =
	//	from s in students
	//	where s.Name[0] == 'M'
	//	select s.Name;
		
	var results = students
		.Any(s => s.Name[0] == 'M');

	results.Dump();
}