.net (c#) port to generate identicons from the ethereum address, like the ones used in Mist or etherscan or similar... 1:1 copy of the "official" implementation https://github.com/ethereum/blockies, written in c#
using ETH_Identicons;
...
Identicon identicon = new Identicon("0x942766be6F3171A4D5c0257a3869233b501175e1", 8); //generates identicon as in Mist (8x8) for the address
identicon.GetBitmap(64); //generates 64x64 Bitmap of the identicon (best to use multiples of 8)
identicon.GetIcon(64); //generates 64x64 Icon of the identicon (best to use multiples of 8)
Or just look at the ExampleApp included with the Solution...