using observal coll delete a items in both collection

Question

Using two observal collction i want to remove items from matching same id with two collection...

 

Collections: 

1. windows

2. windows size 

 

 My Code:

 

foreach (var heat in Settings.RoomViewModelCollection)

{

foreach (var room in heat.HeatTransmission)

{

if (room.Windows.Any(x => WindowSize.Any(y => y.WindowSizeId.Equals(x.WindowSizeId))))

{

heat.HeatTransmission.Remove(room);

break;

}

}

}