PerformanceCounter - Memoria Disponible

     Utilidad dudosa, pero es curioso.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Diagnostics;
using System.Threading;

namespace Memoria_disponible
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {

        }

        PerformanceCounter contadoram = new PerformanceCounter("Memory", "Available MBytes");

        public void button1_Click(object sender, EventArgs e)
        {
        textBox1.Text = (contadoram.NextValue().ToString() + " MB");
        }
    }
}