namespace System.Security.Cryptography { public abstract class DSA : AsymmetricAlgorithm { protected DSA(); public new static DSA Create(); public new static DSA Create(string algName); public abstract byte[] CreateSignature(byte[] rgbHash); public abstract DSAParameters ExportParameters(bool includePrivateParameters); public abstract void ImportParameters(DSAParameters parameters); public abstract bool VerifySignature(byte[] rgbHash, byte[] rgbSignature); } }