Here's a post Upload Media Or Files To Google Photos Using Google Photos API, REST And C#.NET on how to upload media items or files to Google Photos Cloud using C# console application and REST. This is a basic example and can be enhanced based from your needs or requirements.
Before running the code, make sure you have setup your Google Photos Library API correctly and have read the documentations provided below.
Google Photos API Get started with REST
Google Photos API Upload media
Before running the code, make sure you have setup your Google Photos Library API correctly and have read the documentations provided below.
Google Photos API Get started with REST
Google Photos API Upload media