Regular expressions in C#

RegexExamples.cs

using System;
using System.Text.RegularExpressions;

class RegexExamples
{
	public static void Main()
	{
		// Simple match.
		string[] foo = {"vim", "mvim", "gvim", "emacs"};

		foreach (string s in foo) {
			if (Regex.IsMatch(s, @"[mg]?vim")) {
				/// vim, mvim, gvim
				Console.WriteLine(s);
			}
		}

		// Splitting.
		string bar = "separated;with;colons";
		foreach (string item in Regex.Split(bar, @";")) {
			// separated, with, colons
			Console.WriteLine(item);
		}


		// Replacing.
		bar = "Hello, World";
		bar = Regex.Replace(bar, "Hello", "Goodbye");
		// Goodbye, World
		Console.WriteLine(bar);

		bar = "S o m e s p a c e s h e r e";
		bar = Regex.Replace(bar, " ", "");
		bar = Regex.Replace(bar, "Some", "No");
		// Nospaceshere
		Console.WriteLine(bar);


		// Modifiers.
		bar = "John Doe";
		if (Regex.IsMatch(bar, "doe", RegexOptions.IgnoreCase)) {
			Console.WriteLine("Thanks god, Mr. Doe is here!");
		}

	}
}