namespace System.Security.Cryptography
{
    public abstract class SymmetricAlgorithm : IDisposable
    {
        [Obsolete("Cryptographic factory methods accepting an algorithm name are obsolete. Use the parameterless Create factory method on the algorithm type instead.", DiagnosticId = "SYSLIB0045", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        [RequiresUnreferencedCode("The default algorithm implementations might be removed, use strong type references like 'RSA.Create()' instead.")]
        public static SymmetricAlgorithm? Create(string! algName);
    }
}