Example of why methods are better

gistfile1.cs

// This is really elegant with methods, but really, really ugly with query expression

public IQueryable<User> SearchUsers(string firstName, string lastName)
{
	var query = getUserQuery();
	
	if(!string.IsNullOrEmpty(firstName))
		query = query.Where(user => user.FirstName == firstName);
	if(!string.IsNullOrEmpty(lastName))
		query = query.Where(user => user.LastName == lastName);
	
	return query;
}