Call Build on the required project to restore NuGet packages for the project and build it. Or call build for the entire solution.
Most demo applications contain NuGet unmanaged redist packages, specific to used SDK and platform.
rdelangelhmx/.Net-SDK-s-samples
VisioForge .Net SDK's samples - Video Capture SDK, Video Edit SDK, Media Player SDK, Video Fingerprinting SDK
C#MIT