Problem editing metadata tags using WindowsAPICodePack

Hello,

Is it possible to edit tags programmatically using windowsapicodepack? I tried this code:

private void buttonSaveTags_Click(object sender,EventArgs e)
        {
            if (tagBox.Text != "")
            {
                ShellObject media = ShellObject.FromParsingName(openFileDialog2.FileName);
                var mediaTags = media.Properties.GetProperty(SystemProperties.System.Keywords);
                var tagWriter = media.Properties.GetPropertyWriter();
                tagWriter.WriteProperty(SystemProperties.System.Keywords, tagBox.Text);
                tagWriter.Close(); 
            }
        }