Mi a baj az alábbi programmal?

Visual Studioval próbálok launchert készíteni, de nem sikerül. Egy gombnak meg kéne nyitnia a programot, de nem nyitja.

A Gomb.cs kódja:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Diagnostics;

namespace launcher {

class Gomb

{

public static void StartProg()

{

Process.Start("game.exe");

}

}

}

A MainWindow.xaml kódja:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Diagnostics;

namespace launcher

{

/// <summary>

/// Interaction logic for MainWindow.xaml

/// </summary>

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

}

private void Button_Click(object sender, RoutedEventArgs e)

{

launcher.StartProg();

}

}

}

Ezt a hibaüzenetet kapom: The type or namespace name 'StartProg' does not exists in the namespace 'launcher' (are you missing an assambly reference?)