Added Microsoft .NET Framework Cryptography Model to C# section (#59)

README.md

@@ -162,6 +162,7 @@ A curated list of cryptography resources and links.
 
 - [Bouncy Castle](https://bouncycastle.org/csharp/index.html) - All-purpose cryptographic library.
 - [libsodium-net](https://github.com/adamcaudill/libsodium-net) - Secure cryptographic library, port of libsodium for .NET.
+- [Microsoft .NET Framework Cryptography Model](https://docs.microsoft.com/en-us/dotnet/standard/security/cryptography-model) - The .NET Framework implementations of many standard cryptographic algorithms.
 - [PCLCrypto](https://github.com/AArnott/PCLCrypto) - Provides cryptographic APIs over algorithms implemented by the platform, including exposing them to portable libraries.
 - [SecurityDriven.Inferno](https://github.com/sdrapkin/SecurityDriven.Inferno) - .NET crypto done right.
 - [StreamCryptor](https://github.com/bitbeans/StreamCryptor) - Stream encryption & decryption with libsodium and protobuf.