The .NET SDK can be downloaded from:
https://dotnet.microsoft.com/download
Visual Studio Code can be downloaded from:
https://code.visualstudio.com/
This is the URL to the official Neo Blockchain Toolkit extension for Visual Studio Code:
https://marketplace.visualstudio.com/items?itemName=ngd-seattle.neo-blockchain-toolkit
Platform specific errata:
MacOS: Running Neo Express on MacOS requires installing rocksdb via Homebrew:$ brew install rocksdb
Linux: Running Neo Express on Linux requires installing libsnappy and libc6. For example, on systems using the apt package manager:$ sudo apt install libsnappy-dev libc6-dev -y
Commands used in this video:
Checking for .NET SDK installation:$ dotnet --version
(Check for a value greater than 5.)