using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        const string source = "~/Areas/Teste/Views/home/index.cshtml";

        Regex regex = new Regex("^~/Areas/(?<output>[a-zA-Z0-9]+)/*/.*");

        GroupCollection capturas = regex.Match(source).Groups;

        Console.WriteLine(capturas["output"]);

    }

}