using System;
using System.Linq;
using System.Text.RegularExpressions;
using System.Collections.Generic;
public class Test
{
	public static void Main()
	{
		var text = "User:George;Color:Blue;Time:100;Day:Saturday;";
		var dct = Regex.Matches(text, @"([^:;]+):([^;]+)")
			.Cast<Match>()
			.ToDictionary(p => p.Groups[1].Value, p => p.Groups[2].Value); 
		var user = dct["User"];
		var color = dct["Color"];
		var time = dct["Time"];
		var day = dct["Day"];
		Console.WriteLine(user);
		Console.WriteLine(color);
		Console.WriteLine(time);
		Console.WriteLine(day);
	}
}