C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
namespace Procura_Desenhos1._1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void txt_procura_TextChanged(object sender, EventArgs e)
        {

        }

        private void btn_procura_Click(object sender, EventArgs e)
        {
            string toFind = txt_procura.Text;
            var root = new DirectoryInfo(@"c:\");

            var matchingDirectories = SafeEnumerateDirectories(root)
                .Where(d => string.Equals(d.Name, toFind, StringComparison.OrdinalIgnoreCase))
            ;

            foreach (DirectoryInfo directory in matchingDirectories)
            {
                Process.Start(new ProcessStartInfo
                {
                    FileName = directory.FullName,
                    UseShellExecute = true,
                    Verb = "open"
                });
            }
        }
        public static IEnumerable<DirectoryInfo> SafeEnumerateDirectories(DirectoryInfo root)
        {
            if (root == null) throw new ArgumentNullException("root");
            if (!root.Exists) return Enumerable.Empty<DirectoryInfo>();
            return SafeEnumerateDirectoriesCore(root);
        }

        private static IEnumerable<DirectoryInfo> SafeEnumerateDirectoriesCore(DirectoryInfo root)
        {
            var searchPaths = new Stack<DirectoryInfo>();
            searchPaths.Push(root);

            while (searchPaths.Count != 0)
            {
                DirectoryInfo currentPath = searchPaths.Pop();
                yield return currentPath;

                DirectoryInfo[] subFolders = null;
                try
                {
                    foreach (var subDirectory in currentPath.EnumerateDirectories())
                    {
                        searchPaths.Push(subDirectory);
                    }
                }
                catch (UnauthorizedAccessException)
                {
                }
            }
        }
    }
}