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

Check Func(Of T, TResult) Delegate (MSDN)

using System;

public class LambdaExpression
{
   public static void Main()
   {
       Func convert = s => s.ToUpper();

       string name = "Dakota";
       Console.WriteLine(convert(name));   
   }
}

From MSDN

The underlying type of a lambda expression is one of the generic Func delegates. This makes it possible to pass a lambda expression as a parameter without explicitly assigning it to a delegate. In particular, because many methods of types in the System.Linq namespace have Func(Of T, TResult) parameters, you can pass these methods a lambda expression without explicitly instantiating a Func(Of T, TResult) delegate.

EDIT

Possible solution for your case

static void Main(string[] args) 
{
    List numbers = new List { 10, 24, 9, 87, 193, 12, 7, 2, -45, -2, 9 };
    Func, IEnumerable> expr = n => n.Where(n1 => n1 > 6).OrderBy(n1 => n1 % 2 == 0).Select(n1 => n1);
    UseLambda(numbers, expr);
}
private static void UseLambda(List numbers, 
                                 Func, 
                                 IEnumerable> expr) 
{
    var values = expr(numbers);
    foreach (var item in values) {
       Console.WriteLine(item);
    }
}