Linq selecting items that exist in both list

Question

I have 2 list:

myObject object1 = new myObject(id = 1, title = \"object1\"};
myObject object2 = new myObject(id = 2, title = \"object2\"};
myObject object3 =         


        

Answer 1

LINQ Solution:

myObjectList = myObjectList.Where(X => idList.Contains(X.id)).ToList();

Answer 2

IEnumerable<myObject> matches = myObjectList.Join(
    idList,
    o => o.Id,
    id => id,
    (o, id) => o);