ForEach for Two List asp.net MVC

Question

I have two list and the list shows up when I selected a group
I have GrpA,GrpB,GrpC in a dropdown

When I select GrpA or GrpB or GrpC I want to show all the all the list<AppModule> with checkbox not check but when GrpA contains A,B,C I want them to be checked and the rest not checked

public List<AppModule> AppModules { get; set; }

A,B,C,D,E,F,G(show the list with checkboxes beside them not checked)

public List<AppModule> GroupModules { get; set; }
A,B,C

Any help.Thanks John

Pradeep Shet · Answer

Hi John Is it that you want to apply inner join between the two lists? Then below is the ways of getting matching row from list Using Lambda var query = m.Appmodules.Join(m. GroupModules  r => r.MyProperty p => p.MyProperty (r p) => new { r.MyProperty }); Using LINQ var query1 = from a1 in m.Appmodules join b1 in m. GroupModules on a1.MyProperty equals b1.MyProperty select a1.MyProperty; Hope this answer is helpful. Mark it answered if it is so.