Build Me a Antivirus

I wanted to build one antivirus which is able to detect all viruses ransom-wares also is able to clean system and able to scan real time for this you can use clam-av as a back-end engine or you can use any open source antivirus only thing is i wanted it fully working on viruses,ransomware,phishing attacks with real time file scanning also with premium user interface in c#.Net