Overview

A quantifying operation return Boolean for whether some or all of the elements in a set satisfy a condition.

methods

Method	Description	Query expression
`All`	Bool whether all elements in a collection satisfy a condition	N/A
`Any`	Bool whether any elements in a collection satisfy a condition	N/A
`Contains`	Bool whether a collection contains a specified element	N/A

`All`

In this example, find students that scored above 70 on all exams:

IEnumerable<string> names = from student in students
                            where student.Scores.All(score => score > 70)
                            select $"{student.FirstName} {student.LastName}: {string.Join(", ", student.Scores.Select(s => s.ToString()))}";

`Any`

In this example, find students that scored above 95 on any exam:

Enumerable<string> names = from student in students
                            where student.Scores.Any(score => score > 95)
                            select $"{student.FirstName} {student.LastName}: {student.Scores.Max()}";

`Contains`

In this example, find students that scored exactly 95 on an exam:

IEnumerable<string> names = from student in students
                            where student.Scores.Contains(95)
                            select $"{student.FirstName} {student.LastName}: {string.Join(", ", student.Scores.Select(s => s.ToString()))}";