How-To Convert IQueryable Expression Tree to Lambda

How can i conver开发者_运维百科t a IQueryable Expression Tree to a Expression<Func<T,bool>> Expression.

IQueryable<Book> Books;

var query = Books.Where(p => p.Author.AuthorId == 5);

Expression<Func<Book, bool>> expression = ?????

---

You use the IQueryable.Expression Property to access the IQueryable's Expression tree.

---

Expression<Func<Book, bool>> expression = p => p.Author.AuthorId == 5;