https://github.com/OmniSharp/Omnisharp-vim

https://medium.com/@kpereksta/setting-up-a-c-development-environment-with-vim-on-debian-ea42d5b810

Install .NET Core on Debian

You can find the install instructions for most linux distributions here: https://docs.microsoft.com/en-us/dotnet/core/install/linux

On debian specifically here: https://docs.microsoft.com/en-us/dotnet/core/install/linux-debian