SpeechTest.cs

using System;
using System.Speech.Synthesis; // Add System.Speech from Add Reference

class Program
{
    static void Main(string[] args)
    {
        Console.Write("Enter your name: ");
        var name = Console.ReadLine();
        
        var speech = new SpeechSynthesizer();
        speech.Speak("hello " + name);
    }
}