var storeBusiness = Context.BusinessGraph.SingleOrDefault(b => b.BusinessId == business.BusinessId);
          var entry = Context.Entry(storeBusiness);

          //properties
          entry.CurrentValues.SetValues(business);

          //image
          var imageProp = entry.Property(e => e.Image);
          if (imageProp.CurrentValue == null)
            imageProp.IsModified = false;

          //business type
          if (storeBusiness.BusinessType.BusinessTypeId != business.BusinessType.BusinessTypeId)
          {
            var businessType = Context.FindOrAttach(business.BusinessType);
            storeBusiness.BusinessType = businessType;
          }

          //categories
          foreach (var category in storeBusiness.Categories.ToArray())
          {
            if (!business.Categories.Any(c => c.CategoryId == category.CategoryId))
              storeBusiness.Categories.Remove(category);
          }
          foreach (var category in business.Categories)
          {
            var attached = Context.FindOrAttach(category);
            storeBusiness.Categories.Add(attached);
          }

          //branches
          foreach (var branch in storeBusiness.Branches.ToArray())
          {
            if (!business.Branches.Any(b => b.BranchId == branch.BranchId))
              storeBusiness.Branches.Remove(branch);
          }
          foreach (var branch in business.Branches)
          {
            if (branch.BranchId > 0)
            {
              var storeBranch = storeBusiness.Branches.Single(b => b.BranchId == branch.BranchId);
              var branchEntry = Context.Entry(storeBranch);
              branchEntry.CurrentValues.SetValues(branch);

              //branch type
              if (storeBranch.BranchType.BranchTypeId != storeBranch.BranchType.BranchTypeId)
              {
                var branchType = Context.FindOrAttach(branch.BranchType);
                storeBranch.BranchType = branchType;
              }

              //phones
              foreach (var phone in storeBranch.Phones.ToArray())
              {
                if (!branch.Phones.Any(p => p.PhoneId == phone.PhoneId))
                  storeBranch.Phones.Remove(phone);
              }
              foreach (var phone in branch.Phones)
              {
                if (phone.PhoneId > 0)
                {
                  var storePhone = storeBranch.Phones.Single(p => p.PhoneId == phone.PhoneId);
                  var phoneEntry = Context.Entry(storePhone);
                  phoneEntry.CurrentValues.SetValues(phone);
                }
                else
                  storeBranch.Phones.Add(phone);
              }

              //custom fields
              foreach (var custField in storeBranch.CustomFields.ToArray())
              {
                if (!branch.CustomFields.Any(cf => cf.CustomFieldId == custField.CustomFieldId))
                  storeBranch.CustomFields.Remove(custField);
              }
              foreach (var custField in branch.CustomFields)
              {
                if (custField.CustomFieldId > 0)
                {
                  var storeCustField = storeBranch.CustomFields.Single(cf => cf.CustomFieldId == custField.CustomFieldId);
                  var custFieldEntry = Context.Entry(storeCustField);
                  custFieldEntry.CurrentValues.SetValues(custField);
                }
                else
                  storeBranch.CustomFields.Add(custField);
              }

              //opening times
              storeBranch.OpeningTimes.Clear();
              foreach (var ot in branch.OpeningTimes)
              {
                foreach (var wp in ot.WorkingPeriods)
                  wp.WorkingPeriodId = 0;
                ot.OpeningTimesId = 0;

                storeBranch.OpeningTimes.Add(ot);
              }
            }
            else
            {

              storeBusiness.Branches.Add(branch);
            }
          }