New Post: How to delete a selected line?

            List<IFeature> SelectedFeatures = lineLayer.Selection.ToFeatureList();
            if (SelectedFeatures.Count > 0)
            {
                foreach (Feature ft in SelectedFeatures)
                {
                    lineLayer.DataSet.Features.Remove(ft);                                               
                    map1.ResetBuffer();                       
                }
            }