filtering a list using LINQ

i have a list of project objects:

IEnumerable<Project> projects

a Project class as a property called Tags. this is a int[]

i have a variable called filteredTags which is also a int[].

So lets say my filtered tags variable looks like this:

 int[] filteredTags = new int[]{1, 3};

I want to filter my list (projects) to only return projects that have ALL of the tags listed in the filter (in this case at least tag 1 AND tag 3 in the Tags property).

I was trying to use Where() and Contains() but that only seems to work if i am comparing against a single value. How would i do this to compare a list against another list where i need a match on all the items in the filtered list ??