Geometric model is container for alignments, and to delete an existing alignment, the alignment needs to be deleted from geometric model. The below code snippet shows how the alignment is deleted.

Example

internal void DeleteAlignment()
        {
            //Get the current active connection of type ConsensusConnectionEdit 
            Bentley.CifNET.SDK.ConsensusConnection con = Bentley.CifNET.SDK.Edit.ConsensusConnectionEdit.GetActive();
            if (con == null) return;

            //Get geometric model
            Bentley.CifNET.GeometryModel.SDK.GeometricModel geomModel = con.GetActiveGeometricModel();

            //Get all alignments from Geometric model
            foreach (Alignment al in geomModel.Alignments)
            {
                //Delete alignment 
                al.Element.DeleteFromModel();
            }
            return;
        }

Copy to clipboard

Element.DeleteFromModel() is used to delete the alignment from current dgn.