/// <summary>
        /// Create color legend on view with the specific color fill scheme
        /// </summary>
        /// <param name="scheme"></param>
        /// <param name="view"></param>
        public void CreateAndPlaceLegend(ColorFillScheme scheme, Autodesk.Revit.DB.View view)
        {
            using (Transaction transaction = new Transaction(document))
            {
                transaction.Start("Create legend");
                var origin = view.Origin.Add(view.UpDirection.Multiply(20));

                if (view.CanApplyColorFillScheme(schemeCategoryId, scheme.Id))
                {
                    view.SetColorFillSchemeId(schemeCategoryId, scheme.Id);
                    var legend = ColorFillLegend.Create(document, view.Id, schemeCategoryId, origin);
                    legend.Height = legend.Height / 2;
                    transaction.Commit();
                }
                else
                {
                    throw new Exception("The scheme can not be applied on the view.");
                }
            }
        }