Entity framework. Need help filtering results

Question

Need to select data in entity framework but need to filter on the childrent and grandchildren

i have 4 tables. Parent -> Child -> GrandChild -> GreatGran

Answer 1

Using linq you should need something like this.

var q = from q1 in dbContext.Parent
        join q2 in dbContext.Children
        on q1.key equals q2.fkey
        join q3 in  ........
        where q4.col1 == 3000
        select q1;