Part 1: My team and I were struggling a bit early with creating a FeatureLayer and adding it to the active map using ArcGIS Pro SDK 2.2. We finally figured it out and were wondering about the Geoprocessing.ExecuteToolAsync which we used. Is there a list somewhere that shows all the ESRI developed tool paths? We used "CreateFeatureclass_management" for our purposes and the "cheat" I found was just to go to ArcGIS Pro interface's Python window and import arcpy and then type arcpy. to get the intellisense to help. But if there was a web page that was available that would be better.
Part 2: It appears that we are calling Python code from C# (in our case). We have the .Net SDK I would think there should be a way to do what "CreateFeatureclass_management" does in C#? If not why not?
Did you checked this: ProConcepts Geoprocessing · Esri/arcgis-pro-sdk Wiki · GitHub
Why do you think that use call python?
In each tool help there is the python name for it. The C# name is very similar.