using System;
using System.Text.RegularExpressions;
namespace TestRegex
{
class MainClass
{
public static void Main(string[] args)
{
string begin = "-----BEGIN some variable text-----";
string end = "-----END";
Console.WriteLine(Regex.Replace(begin, "-----BEGIN .*-----", ""));
Console.WriteLine(Regex.Replace(end, "-----END.*", ""));
Console.ReadLine();
}
}
}