C#のジェネリックで配列とリストを扱う | Codetter（こーどったー）

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using System;
using System.Collections.Generic;
void swap<T>(IList<T> l,int a,int b){
    Console.WriteLine(l.Count);
    (l[a],l[b])=(l[b],l[a]);
}
int[] ary={0,1,2,3,4,5,6,7,8,9};
Console.WriteLine(string.Join(", ",ary));
swap(ary,4,5);
Console.WriteLine(string.Join(", ",ary));
var lst=new List<int>{0,1,2,3,4,5,6,7,8,9};
Console.WriteLine(string.Join(", ",lst));
swap(lst,4,5);
Console.WriteLine(string.Join(", ",lst));
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX