Filtering data from 2 table - linq

Question

Here I have 2 query variable for showing a different type of data,But i want to extract a particular data from first query ,which don't have reference in second query
I have the following code,but it does not work properly as.first query variable is used to join 4 table like A,B,C,D and Second Query variable Join table A and B.Here i want a data from First variable and it don't have any reference in second table
public List<ProductEntityList> GetProductListRegister()
{
var ProductList1 = new List<ProductEntityList>();
var ProductList = new List<ProductEntityList>();
var finalList = new List<ProductEntityList>();
try
{
using (HabitGreen01Entities ob = new HabitGreen01Entities())
{
var list1 = from ctr in ob.TblCreateUsers
join shp in ob.TblShopMasters
on ctr.id equals shp.Fk_CreateUser_Id
join prd in ob.TblProductMaster01
on shp.id equals prd.FK_ShopMaster_Id
select new ProductEntityList
{
Id = prd.id,
Name = prd.Name,
ShopName = shp.Name,
UserName = ctr.Name
};
ProductList1 = list1.ToList();
var temp = from pd in ob.TblProductMaster01
join cr in ob.TblAccountSettings
on pd.id equals cr.f_productmaster01Id
select new ProductEntityList
{
Id = (int)cr.f_productmaster01Id,
Name=pd.Name
};
ProductList = temp.ToList();
var temp1 = from item in ProductList1
where !ProductList.Contains(x=>item.Id)
select new ProductEntityList
{
Id = item.Id,
Name = item.Name,
ShopName = item.ShopName,
UserName = item.UserName
};
finalList = temp1.ToList();
// var temp1= ProductList1.Select(f=>f.Id).Intersect(ProductList.Select(b=>b.Id));
//finalList = matches.ToList();
}
}
catch (Exception e)
{
throw e;
}
return (finalList);
}

Answer 1

Try this:
var temp1 = from item in ProductList1
where !ProductList.Select(c=>c.Id).Contains(item.Id)
select new ProductEntityList
{
Id = item.Id,
Name = item.Name,
ShopName = item.ShopName,
UserName = item.UserName
};
You can write directly:
var finalList = (from item in ProductList1
where !ProductList.Select(c=>c.Id).Contains(item.Id)
select new ProductEntityList
{
Id = item.Id,
Name = item.Name,
ShopName = item.ShopName,
UserName = item.UserName
}).ToList();

Answer 2

var result = ProductList1.Where(p => !ProductList.Any(p2 => p2.Id== p.Id));
finalList = result.ToList();