using System.Collections.Generic;
using System.Text.RegularExpressions;
public static void Main()
List<string> list = new List<string>() { "Learn C", "Code C++", "Web Design", "C# with LINQ" };
System.Text.RegularExpressions.Regex re = new Regex(@"(C#|C|C\+\+)");
var query = from li in list
Console.WriteLine("Cac phan tu co chua tu khoa C, C++ và C# là: ");
foreach(var item in query)
Console.WriteLine("Nhan bat ky nut nao de thoat!");