//program.cs

using System;
using System.Collections.Generic;
using System.Windows.Forms;

namespace DriveInfo_GetDrives
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

//form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace DriveInfo_GetDrives
{
    public partial class Form1 : Form
    {
        private long m = 0;
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            
        }

        private void Button_GetInfo_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();//建立stringbuilder对象,用于在内存中存储临时信息
            DriveInfo[] myAllDrives = DriveInfo.GetDrives();// DriveInfo对象数组,存储获得的磁盘信息
            try
            {
                foreach (DriveInfo myDrive in myAllDrives)//循环写入每个磁盘的参数 属性
                {
                    if (myDrive.IsReady)
                    {
                        sb.Append("磁盘驱动器盘符:");
                        sb.AppendLine(myDrive.Name);
                        sb.Append("磁盘卷标:");
                        sb.AppendLine(myDrive.VolumeLabel);
                        sb.Append("磁盘类型:");
                        sb.AppendLine(myDrive.DriveType.ToString());
                        sb.Append("磁盘格式:");
                        sb.AppendLine(myDrive.DriveFormat);
                        sb.Append("磁盘大小:");
                        m = myDrive.TotalSize / (1024 * 1024);
                        sb.AppendLine(m.ToString()+"M");
                        sb.Append("磁盘可用剩余空间:");
                        m = myDrive.AvailableFreeSpace / (1024 * 1024);
                        sb.AppendLine(m.ToString()+"M");
                        sb.Append("磁盘总剩余空间:");
                        m= myDrive.TotalFreeSpace/(1024*1024);
                        sb.AppendLine(m.ToString()+"M");
                        sb.AppendLine("--------------------------------------------------");
                    }
                }
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            this.textBox_ShowInfo.Text = sb.ToString();//显示信息
        }
    }
}