Finding an element with Linq and lambda expressions: but doesn't work

Have a look to the following example:

The first solution, using the foreach, works pretty well and easily. But I was trying to write it using Linq and I could not achieve this result. I made some attempts but no one succeeded.

I expect to find just one element.

The problem is not at runtime: I don't know very well the Linq sintax and so I don't know how to get the element called PlacedSelection (the foreach structure clarifies where I'm looking for it). Instead in my attempt I could get the PlacedCategory elements.. but I don't need this..

PlacedSelection ActualSelection = null;

foreach (var placedCategory in Model.Coupon.Categories)
{
    foreach (PlacedSelection placedSelection in placedCategory.Value.Selections)
    {
        var pp = placedSelection.EventId;
        if (pp == Model.EventId)
        {
            ActualSelection = placedSelection;
            break;
        }
    }
}
//IEnumerable<KeyValuePair<string, PlacedCategory>> p = Model.Coupon.Categories(c => c.Value.Selections.Any(s=> s.EventId == Model.EventId));