.NET Fiddle

CSharp · Console

/Program.cs

using System;
using System.Text.RegularExpressions;

public class Program
{
	public static void Main()
	{
		String text = "[Testing.User]|Info:([Testing.Info]|Name:([System.String]|Matt)|Age:([System.Int32]|21))|Description:([System.String]|This is some description)|Anything:SomeDataHere";
		String pattern = "(\\[\\w+\\.\\w+\\])\\|(\\w+:.+)\\|(\\w+:.+)";
		
		Match match = Regex.Match(text, pattern);
		if (match.Success)
		{
			Console.WriteLine(match.Groups[1]);
			Console.WriteLine(match.Groups[2]);
			Console.WriteLine(match.Groups[3]);	
		}
	}
}