//for browse
private void browse2()
        {
            string strPath;
            string strCaption = "Select a Directory and folder.";
            DialogResult dlgResult;
            Shell32.ShellClass shl = new Shell32.ShellClass();
            Shell32.Folder2 fld = (Shell32.Folder2)shl.BrowseForFolder(0, strCaption, 0,
                        System.Reflection.Missing.Value);
            if (fld == null)
            {
                dlgResult = DialogResult.Cancel;
            }
            else
            {
                strPath = fld.Self.Path;
                dlgResult = DialogResult.OK;
                this.txtDest.Text = strPath.ToString();
            }
        }
//for open folder
private void btnOpen_Click(object sender, EventArgs e)
        {
            try
            {
                Process.Start(txtDest.Text);
            }
            catch
            {
                MessageBox.Show("Please select one file/folder");
            }
        }