ToArray

using System;/*from  j a v  a  2s  .  c o m*/
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class MainClass {
    public static void Main() {
        string[] presidents = {"G", "java2s.com", "a", "H", "over", "Jack"};

        string[] names = presidents.OfType<string>().ToArray();
        foreach (string name in names)
            Console.WriteLine(name);
    }
}