SchwabApiCS is a C# library(dll) implementing Schwab's trader API (streaming partial) SchwabApiCS includes a WPF library that launches the Schwab reauthorization page only when needed and captures the tokens automatically. Connect on discord.com server SchwabApiCS-C# https://discord.gg/ebaZUqVa

Video - Getting Started - what to to when starting the first time: (This is a little out of date as some things have changed since the video was made, but still good context)

https://u.pcloud.link/publink/show?code=XZrmLs0ZmbxI8ETu4b8Jyfor6VxyYkyEN4s7

Video - Explains exception handling in SchwabApiCS:

https://u.pcloud.link/publink/show?code=XZ4Pa10ZAWck16SnTb4reyeRdMVk4S4lYflk