Example of regex w/named capture & lazy static initialization

RegEx-NamedCapture

const string REGEX = @"((?<id>\d+)\:)?(?<par1>\d+)\-(?<par2>\d+)\-(?<par3>\d+)(\/(?<par4>\d+)\-(?<par5>\d+))?";

private static Lazy<Regex> g_RegEx = new Lazy<Regex>(() => new Regex(REGEX,
		RegexOptions.ExplicitCapture | RegexOptions.Compiled | RegexOptions.CultureInvariant));

...
		
Match m = g_RegEx.Value.Match(value);

Group gID = m.Groups["id"] as Group;
Group gPar1 = m.Groups["par1"] as Group;
Group gPar2 = m.Groups["par2"] as Group;
Group gPar3 = m.Groups["par3"] as Group;
Group gPar4 = m.Groups["par4"] as Group;
Group gPar5 = m.Groups["par5"] as Group;

int par1 = int.Parse(gPar1.Value);