C# - Use OfType and ignore inherited classes

Question

I have a MenuStrip with lots of items and am trying to have on event they all subscribe to so I am trying to do menuStrip1.Items.OfType<ToolStripMenuItem>(); and for each one I do this:

menuitem.Click += new EventHandler(MenuItem_Click);

The problem is there is a ToolStripSeperatorItem which inherits off ToolStripMenuItem and that appears is my list of items and errors because it does not have a Click event.

How can I not include these in my OfType method?

Answer 1

menuStrip1.Items.OfType<ToolStripMenuItem>()
                .Where(i => i.GetType() == typeof(ToolStripMenuItem))

Answer 2

Maybe like this:

menuStrip1.Items
    .OfType<ToolStripMenuItem>()
    .Except(menuStrip1.Items.OfType<ToolStripSeparatorItem>())

Answer 3

menuStrip1.Items.OfType<ToolStripMenuItem>().Where(it => it.GetType() == typeof(ToolStripMenuItem));

It seems kind of redundant, but by doing both, you maintain the return type.

Answer 4

menuStrip1.Items
 .Cast<ToolStripMenuItem>()
 .Where(i => i.GetType() == typeof(ToolStripSeparatorItem));

Because you don't need an implicit cast and comparision (OfType) which is basically slower then explicit cast with Cast