Blding string simply

StringFactory.cs

using System;
using System.Text;

namespace Mjollnir
{
    static class StringFactory
    {
        public static string Create(Action<StringBuilder> action)
        {
            if (action == null) throw new ArgumentNullException("action");

            var sb = new StringBuilder();

            action(sb);

            return sb.ToString();
        }
    }
}

var text = StringFactory.Create(stream =>
{
stream.WriteByte(0x030);
stream.WriteByte(0x031);
stream.WriteByte(0x032);
});