C # converte string em hash MD5

public static string MD5Hash(string input)
{
StringBuilder hash = new StringBuilder();
MD5CryptoServiceProvider md5provider
= new MD5CryptoServiceProvider();
byte[] bytes = md5provider.ComputeHash(new UTF8Encoding().GetBytes(input));

for (int i = 0; i < bytes.Length; i++)
{
hash
.Append(bytes[i].ToString("x2"));
}
return hash.ToString();
}