public bool Delete(Guid ID)
 {
     InputData_DTO.ProjectModels.Category cate = _context.Categories.SingleOrDefault(admin => admin.ID == ID);
     _context.Categories.DefaultIfEmpty(cate);
     _context.Entry(cate).State = System.Data.Entity.EntityState.Deleted;
     return(_context.SaveChanges() == 1);
 }
 public bool Update(InputData_DTO.ProjectModels.Category cate)
 {
     _context.Categories.Attach(cate);
     _context.Entry(cate).State = System.Data.Entity.EntityState.Modified;
     return(_context.SaveChanges() == 1);
 }