static private System.IServiceProvider serviceProvider;

private Command1(AsyncPackage package, OleMenuCommandService commandService)
{
    serviceProvider = package;
}

private void Execute(object sender, EventArgs e)
{
    ThreadHelper.ThrowIfNotOnUIThread();

    IVsSolution7 vs7 = serviceProvider.GetService(typeof(SVsSolution)) as IVsSolution7;

    //打开文件夹
    vs7.OpenFolder("E:\\esp_project\\ble_hid_device_demo");
}