using System; using System.Collections.Generic; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks; namespace QRCodeService.Extensions { public static class StringExtension { public static byte[] ToMD5(this string value) { using (var md5 = MD5.Create()) { var result = md5.ComputeHash(Encoding.UTF8.GetBytes(value)); return result; } } } }