Hi,
first you can use the COM-based components as well in C# as you used them in VBA
In managed access you can look into the namespace Autodesk.AutoCAD.EditorInput and there you find .SelectImplied (what is currently within your Pickfirst-SelectionSet) or the function .SetImpliedSelection (which set's some objects you like to make them selected/gripped).
BTW: there is a special forum for .NET with AutoCAD >>>there<<< (for your next questions 😉 ).
- alfred -
Thank you for your reply Alfred.
Very helpful.