using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {   

        var names = new string[]{"John", "Hanna", "Bill", "Donald"};

        List<A> myCollection = new List<A>();

        myCollection.Add(new A(){Name="A"});

        myCollection.Add(new A(){Name="Hanna"});        

        var filteredItems = myCollection.Where(x=> names.Any(y=>y==x.Name)); 

        foreach(var item in filteredItems)

        {

           Console.WriteLine(item.Name);

        }

    }

}

public class A

{

   public string Name {get;set;}

}