class Program
 {
  private static string _sValue = string.Empty; 
  static void Main(string[] args)
  {
   Console.WriteLine("請(qǐng)輸入待查找值：");
   _sValue = Console.ReadLine();
   Console.WriteLine($"正在查詢。。。");
 
   var registryKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine,
     Environment.Is64BitOperatingSystem ? RegistryView.Registry64 : RegistryView.Registry32); //判斷機(jī)器位數(shù)
   int i = 0;
   GetKeyNames(registryKey, ref i);
   Console.WriteLine($"查詢結(jié)束。。。");
   Console.ReadKey();
  }
 
  /// <summary>
  /// 遍歷所有子項(xiàng)
  /// </summary>
  /// <param name="subkey">節(jié)點(diǎn)</param>
  /// <param name="i"></param>
  private static void GetKeyNames(RegistryKey subkey, ref int i)
  {
   foreach (var subkey_name in subkey.GetSubKeyNames()) // 檢索包含所有子項(xiàng)名稱的字符串?dāng)?shù)組
   {
    try
    {
     using (RegistryKey csubkey = subkey.OpenSubKey(subkey_name))
     {
      GetValueName(csubkey, ref i);
      GetKeyNames(csubkey, ref i);
     }
    }
    catch { }
   }
  }
 
  /// <summary>
  /// 若包含輸入值則輸出記錄
  /// </summary>
  /// <param name="subkey">節(jié)點(diǎn)</param>
  /// <param name="i"></param>
  private static void GetValueName(RegistryKey subkey, ref int i)
  {
   foreach (var name in subkey.GetValueNames()) //檢索包含與此項(xiàng)關(guān)聯(lián)的所有值名稱的字符串?dāng)?shù)組
   {
    var sValue = subkey.GetValue(name) + string.Empty;
    if (string.Compare(sValue, string.Format(@"{0}", _sValue, StringComparison.OrdinalIgnoreCase)) == 0)
    {
     Console.WriteLine(++i + "\t" + subkey.Name);
    }
   }
  }
 }

using System;
using System.Windows.Forms;
using Microsoft.Win32;
 
namespace GetSoftWarePathExp
{
  public partial class Form1 : Form
  {
    public Form1()
    {
      InitializeComponent();
    }
 
    private void button1_Click(object sender, EventArgs e)
    {
      try
      {
        string softName = textBox1.Text.ToString();
        string strKeyName = string.Empty;
        string softPath = @"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\";
        RegistryKey regKey = Registry.LocalMachine;
        RegistryKey regSubKey = regKey.OpenSubKey(softPath + softName + ".exe", false);
 
        object objResult = regSubKey.GetValue(strKeyName);
        RegistryValueKind regValueKind = regSubKey.GetValueKind(strKeyName);
        if (regValueKind == Microsoft.Win32.RegistryValueKind.String)
        {
          this.label3.Text = objResult.ToString();
        }
      }
      catch
      {
        this.label3.Text = "朋友，獲取程序路徑失??！";
      }
    }
  }
}