using System;
using System.Linq;

public class Test
{
	public static void Main()
	{
		int[] msv = { -1, 2, 3, -4 };
		var res = from n in msv
        	  where n > 0
	          select n; // 2, 3
		for(int i in res) {
			Console.WriteLine(i);
		}
	}
}