Is there any way to pass the lambda expression as a variable or argument?

Question

I need to pass the lambda query as a parameter, the followings code is sample and I am interesting to find an implement for it, there is samples: some thing like this:

Answer 1

If you define your LINQ expressions like this:

Func, IEnumerable> expr1 =
               l => l.Where(n => n > 6).OrderBy(n => n % 2 == 0).Select(n => n);

Func, IEnumerable> expr2 = 
               l => l.TakeWhile((n, index) => n >= index);

And your UseLambda method as:

public void UseLambda (IEnumerable source 
                          ,Func, IEnumerable> lambda)
{
    var items= lambda(source);

    foreach(var item in items)
       Console.Writeline(item.ToString());
    }
}

Then you I think you have what you're looking for.