Cryptography methods

CryptographyHelper.cs

public class CryptographyHelper
{
    public static string CalculateMD5Hash(string value)
    {
        var md5 = MD5.Create();

        byte[] hash = md5.ComputeHash(Encoding.ASCII.GetBytes(value.Trim()));

        var sb = new StringBuilder();

        foreach (byte b in hash)
        {
            sb.Append(b.ToString("x2"));
        }

        return sb.ToString();
    }
}