Using linq to iterate through winform menuitems and change a property value

Question

I have a context menu. I went to iterate through all the menu items and disable or enable them based on a some boolean value.

This is what I have so far, but it doesn't work:

contextMenu.MenuItems.Cast<MenuItem>().Select(x =>
{
   x.Enabled = someValue; 
   return x;
});

Answer 1

Use a simple foreach loop for update your values, LINQ is for querying

foreach(var item in contextMenu.MenuItems.OfType<MenuItem>())
{
    item.Enabled = someValue;
}

Answer 2

The closest thing is the ForEach method on List<T>. I don't this that it's technically considered LINQ and unlike the core LINQ to Objects methods it's not part of IEnumerable<T>. Anyway, I'm guessing you'll prefer it to a traditional foreach loop since it looks like any other LINQ query using method syntax.

contextMenu.MenuItems.Cast<MenuItem>().ToList().ForEach(x => x.Enabled = someValue);