doc: Add NBitcoin to bitcoinconsensus examples

Author: Braydon Fuller

doc/shared-libraries.md

@@ -38,4 +38,5 @@ The interface is defined in the C header `bitcoinconsensus.h` located in  `src/s
 - `bitcoinconsensus_ERR_DESERIALIZE` - An error deserializing `txTo`
 
 ### Example Implementations
+- [NBitcoin](https://github.com/NicolasDorier/NBitcoin/blob/master/NBitcoin/Script.cs#L814) (.NET Bindings)
 - [node-libbitcoinconsensus](https://github.com/bitpay/node-libbitcoinconsensus) (Node.js Bindings)