SystemExtensions/SystemExtensions.NetStandard/Extensions/StringExtensions.cs

using System.Text;

namespace System.Extensions
{
    public static class StringExtensions
    {
        public static byte[] GetBytes(this string s)
        {
            return Encoding.UTF8.GetBytes(s);
        }

        public static string GetString(this byte[] bytes)
        {
            return Encoding.UTF8.GetString(bytes);
        }
    }
}