System.Security.Cryptography.DSASignatureFormatter.SetKey C# (CSharp) Method

		public override void SetKey (AsymmetricAlgorithm key)
		{
			if (key != null) {
				// this will throw a InvalidCastException if this isn't
				// a DSA keypair
				dsa = (DSA) key;
			}
#if NET_2_0
			else
				throw new ArgumentNullException ("key");
#else
			// null is accepted in 1.0/1.1
#endif
		}
	}