Building RyujiNX (Windows only for now):

Support for OSX and Linux is limited and not really recommended for use as of late.
To get started; you will need the .NET Core 2.0 or greater runtime installed.

Step one:

Download NET Core, here. Then install the SDK.

Step two: Variant one

After the installation of the Net Core SDK is done; go ahead and copy the Clone link from GitHub From here~ (via Clone or Download --> Copy HTTPS Link. Or you can download the ZIP tarball.)
You can Git Clone the repo by using the GitBash, or you may use the second variant.

Step two: Variant two

Download the ZIP Tarball. Then extract it to a directory of your choice.

Step three:

Build the App using a Command prompt in the ROOT directory. You can quickly access it by Holding shift in explorer (in the RyujiNX directory) then right clicking,
and typing the following command~ "dotnet publish -c Release -f win10-x64".
The build directory is "root/bin/release/etc/etc."

Step four:

In order to run a NRO or NSO; simply drag the file onto the Executable. The app will launch, and the homebrew/application will begin emulation.
Do keep in mind, that emulation is finicky, and will most likely crash at some point.