CreateStreamMarker

using System; //must also add netstandard.dll in Find References tab
using Twitch.Common.Models.Api; //Needed for StreamMarker Type
public class CPHInline
{
    public bool Execute()
    {
        //Get input from command for marker
        CPH.TryGetArg("rawInput",out string description);

        //Create marker
        StreamMarker markerInfo = CPH.CreateStreamMarker(description); 
        //Access stream marker info
        //Get when marker was created
        DateTime createdAt = markerInfo.CreatedAt;
        //Get Marker position in seconds
        int position = markerInfo.Position;
        //Get marker description
        string markerDesc = markerInfo.Description;

        return true;
    }
}