c# - Linq to compare two lists of objects where one object has several lists -

public class myobject1 {     public  guid g1;     public guid g2;     public guid g3; }  public class myobject2 {     public guid g4; }   list<myobject1> list1; list<myobject2> list2; 

i linq query return myobject1 objects in list1 myobject1.g2 == myobject2.g4 myobject2 objects live in list 2

i have written code in numerous steps think in 1 iteration.

so

var n = list1.select(p=> p.g2).tolist()  var o = list2.intersect(n) 

but need research list1 using o again awkward

it sounds want join:

var query = x1 in list1             join x2 in list2 on x1.g2 equals x2.g4             select x1; 

or in extension method syntax:

var query = list1.join(list2, x1 => x1.g2, x2 => x2.g4, (x1, x2) => x1); 

note give items list1 - if need corresponding item list2 well, that's simple:

var query = x1 in list1             join x2 in list2 on x1.g2 equals x2.g4             select new { x1, x2 };