How to split a string into elements in C#?

Question

Programming

Error program:

string str = "one, two, three, four, five";
string[] num = str.Split(", ");
Console.WriteLine(num[0]);
Console.ReadLine();

As far as I understand, single quotes should be used here, but why?
And why can't more than one character be used in them? After all, either a space or a comma will remain in the word.

Answer 1

If you carefully read MSDN Split , it turns out that an array of characters is passed to the method. Characters are separated by single quotes. What prevents you from passing an array of characters to the method?
var num = str.Split(new [] {' ', ','});

Answer 2

var a = "one, two, three, four, five".Split( new[] { ", " }, StringSplitOptions.None );
foreach ( string b in a ) { Console.WriteLine( b ); };