Contains with predicate returned false : Contains « LINQ « C# / CSharp Tutorial

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"A", "H", "a", "H", "over", "Jack"};
        bool contains = presidents.Contains("G");

22.28.1.Contains with string value
22.28.2.Contains with string value and IEqualityComparer
22.28.3.Use Contains to check the existance of an element
22.28.4.Contains with predicate returned false
22.28.5.Contains with IEqualityComparer
22.28.6.A query to extract strings containing the letter 'a', sorted by length and converted to uppercase