They were all using the same .cs source files so just including the generic monotouch .sources
makes it easier to reason about and reduces the risk of forgetting to update one of the lists.
-#include corlib.dll.sources
-CommonCrypto/CommonCrypto.cs
-CommonCrypto/CryptorTransform.cs
-CommonCrypto/FastCryptorTransform.cs
-CommonCrypto/CorlibExtras.cs
-CommonCrypto/RijndaelManaged.cs
-CommonCrypto/SecRandom.cs
-CommonCrypto/RC4CommonCrypto.cs
-System/Environment.iOS.cs
-System/Guid.MonoTouch.cs
-System/NotSupportedException.iOS.cs
-CoreFoundation/CFHelpers.cs
-System.Security.Cryptography.X509Certificates/X509CertificateImplApple.cs
-System.Security.Cryptography.X509Certificates/X509Helper.Apple.cs
-System.Text/EncodingHelper.MonoTouch.cs
+#include monotouch_corlib.dll.sources
-#include corlib.dll.sources
-CommonCrypto/CommonCrypto.cs
-CommonCrypto/CryptorTransform.cs
-CommonCrypto/FastCryptorTransform.cs
-CommonCrypto/CorlibExtras.cs
-CommonCrypto/RijndaelManaged.cs
-CommonCrypto/SecRandom.cs
-CommonCrypto/RC4CommonCrypto.cs
-System/Environment.iOS.cs
-System/Guid.MonoTouch.cs
-System/NotSupportedException.iOS.cs
-CoreFoundation/CFHelpers.cs
-System.Security.Cryptography.X509Certificates/X509CertificateImplApple.cs
-System.Security.Cryptography.X509Certificates/X509Helper.Apple.cs
-System.Text/EncodingHelper.MonoTouch.cs
+#include monotouch_corlib.dll.sources
-#include corlib.dll.sources
-CommonCrypto/CommonCrypto.cs
-CommonCrypto/CryptorTransform.cs
-CommonCrypto/FastCryptorTransform.cs
-CommonCrypto/CorlibExtras.cs
-CommonCrypto/RijndaelManaged.cs
-CommonCrypto/SecRandom.cs
-CommonCrypto/RC4CommonCrypto.cs
-System/Environment.iOS.cs
-System/Guid.MonoTouch.cs
-System/NotSupportedException.iOS.cs
-CoreFoundation/CFHelpers.cs
-System.Security.Cryptography.X509Certificates/X509CertificateImplApple.cs
-System.Security.Cryptography.X509Certificates/X509Helper.Apple.cs
-System.Text/EncodingHelper.MonoTouch.cs
+#include monotouch_corlib.dll.sources
-#include corlib.dll.sources
-CommonCrypto/CommonCrypto.cs
-CommonCrypto/CryptorTransform.cs
-CommonCrypto/FastCryptorTransform.cs
-CommonCrypto/CorlibExtras.cs
-CommonCrypto/RijndaelManaged.cs
-CommonCrypto/SecRandom.cs
-CommonCrypto/RC4CommonCrypto.cs
-System/Environment.iOS.cs
-System/Guid.MonoTouch.cs
-System/NotSupportedException.iOS.cs
-CoreFoundation/CFHelpers.cs
-System.Security.Cryptography.X509Certificates/X509CertificateImplApple.cs
-System.Security.Cryptography.X509Certificates/X509Helper.Apple.cs
-System.Text/EncodingHelper.MonoTouch.cs
+#include monotouch_corlib.dll.sources
-#include corlib.dll.sources
-CommonCrypto/CommonCrypto.cs
-CommonCrypto/CryptorTransform.cs
-CommonCrypto/FastCryptorTransform.cs
-CommonCrypto/CorlibExtras.cs
-CommonCrypto/RijndaelManaged.cs
-CommonCrypto/SecRandom.cs
-CommonCrypto/RC4CommonCrypto.cs
-System/Environment.iOS.cs
-System/Guid.MonoTouch.cs
-System/NotSupportedException.iOS.cs
-CoreFoundation/CFHelpers.cs
-System.Security.Cryptography.X509Certificates/X509CertificateImplApple.cs
-System.Security.Cryptography.X509Certificates/X509Helper.Apple.cs
-System.Text/EncodingHelper.MonoTouch.cs
+#include monotouch_corlib.dll.sources