unity AssetBundle打包

[MenuItem("Assets/buildassbundle")]
static void buidassetbundle()
{
    string die = "assetbundles";
    if (Directory.Exists(die)==false)
    {
        Directory.CreateDirectory(die);
    }
    BuildPipeline.BuildAssetBundles(die, BuildAssetBundleOptions.None, BuildTarget.StandaloneWindows64);
}