namespace System.Security.Cryptography
{
    public abstract class HashAlgorithm : IDisposable, ICryptoTransform
    {
        [Obsolete("The default implementation of this cryptography algorithm is not supported.", DiagnosticId = "SYSLIB0007", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        public static HashAlgorithm! Create();
    }
}