I am trying to import a map and layout into an existing project using a template(aptx). I am not sure on the coding, ie. what library to use. I basically want to replicate the Import Map tool in ArcPro through code (ArcGIS Pro SDK).
Michael, I think what you are after is documented here: https://github.com/esri/arcgis-pro-sdk/wiki/ProConcepts-Content-and-Items#itemfactory-and-import