public ActionResult <ProjectTemplateDTO> DeleteProject(long projectTemplateId) { try { var delProjectTemplate = _projectTemplates.GetById(projectTemplateId); _projectTemplates.Remove(delProjectTemplate); _projectTemplates.SaveChanges(); return(new ProjectTemplateDTO(delProjectTemplate)); } catch (ArgumentNullException) { return(NotFound(new CustomErrorDTO("Project concept niet gevonden"))); } }