[twsted]

Not .net: Shell, PHP and C.

And about 150M of virtual memory on my rpi.

Edit: Argh, I thought you meant pihole, sorry for the confusion

[danmur]

Looks like .net to me: https://github.com/TechnitiumSoftware/DnsServer

[LtdJorge]

Technitium IS .NET, you may be referring to PiHole?