Intersection - Envelope

Question

I have Envelope[][] extents = new Envelope[][]; construction. Each envelope has MinX, MaxX, MinY and MaxY properties and represents one tile of a grid (bottom-left and top-right point). Now I have another Envelope bounds; which contains min and max values for X- and Y-axis. I want to get tiles from extents which intersects with bounds.

Is there any simple way to do this using Envelope.Intersect?

[edit]
For now I did it in this way (brute-force xD):

List<Envelope> intersectedTiles = new List<Envelope>();
for (int i = 0; i < extents.LongLength; i++)
{
    for (int j = 0; j < extents.Length; j++)
    {
        if (extents[i][j].MinX >= bounds.MinX && extents[i][j].MaxX <= bounds.MaxX &&
            extents[i][j].MinY >= bounds.MinY && extents[i][j].MaxY <= bounds.MaxY)
        {
            intersectedTiles.Add(extents[i][j]);
        }
    }
}

Answer 1

private static bool Intersects(Envelope e1, Envelope e2)
{
    return e1.MinX >= e2.MinX && e1.MaxX <= e2.MaxX && e1.MinY >= e2.MinY && e1.MaxY <= e2.MaxY;
}

List<Envelope> intersectedTiles = extents.SelectMany(es => es)
    .Where(e => Intersects(e, bounds))
    .ToList();