void Main()
{
	// Write code to test your extensions here. Press F5 to compile and run.
}

public static class MyExtensions
{
	// Write custom extension methods here. They will be available to all queries.
	public static IEnumerable<T> ForEach<T>(this IEnumerable<T> source, Action<T> consumer)
	{
		throw new Exception(consumer.ToString());
		foreach (var each in source)
		{
			consumer(each);
			yield return each;
		}
	}
}

// You can also define non-static classes, enums, etc.