This project aims to provide useful additions to the existing LINQ operators available out-of-the-box on the .NET Framework.
The library consists of extension methods to IEnumerable and to IEnumerable<T>, so you simply need to import the LinqContrib namespace and take advantage of the new operators.
controls.AnyOfType<UserControl>() // shorthand for controls.OfType<UserControl>().Any()
controls.NotOfType<UserControl>() // shorthand for controls.Where(control => !(control is UserControl))