Contains with IEqualityComparer : Contains « LINQ « C# / C Sharp

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C# / C Sharp » LINQ » ContainsScreenshots 
Contains with IEqualityComparer
 

using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MyStringifiedNumberComparer : IEqualityComparer<string> {
    public bool Equals(string x, string y) {
        return (Int32.Parse(x== Int32.Parse(y));
    }

    public int GetHashCode(string obj) {
        return Int32.Parse(obj).ToString().GetHashCode();
    }
}
public class MainClass {
    public static void Main() {
        string[] stringifiedNums = {"001""49""017""0080""00027""2" };
        bool contains = stringifiedNums.Contains("2",new MyStringifiedNumberComparer());
        Console.WriteLine(contains);
    }
}

 
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2.Contains with string value and IEqualityComparer
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5.A query to extract strings containing the letter "a", sorted by length and converted to uppercase
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