It's been a long time since I've been using stupid methods like one-dimensional arrays. C# has always provided some very useful tips. This blog will tell you a very common way to get a list of characters composed of commas and strings.
C# Extract comma separated strings
string s = "11,222,3";
List<string> list = new List<string>(s.Split(','));
The result is
list [0] = 11; list [1] = 222, list [3] = 3
Take notes.