如何使单词在通过互操作打开文档时可见

我想通过互操作打开一个word文档，并且单词必须在过程中可见。它看起来相当简单，因为有一个名为"在 Word 文档的打开函数中可见"的参数。但文字在背景中。我错过了什么？

static void Main(string[] args)
{
    Microsoft.Office.Interop.Word.Application word = null;
    word = new Microsoft.Office.Interop.Word.Application();
    object inputFile = "c:''test.docx";
    object confirmConversions = false;
    object readOnly = true;
    object visible = true;
    object missing = Type.Missing;
    // Open the document...
    Microsoft.Office.Interop.Word.Document doc = null;
    doc = word.Documents.Open(
        ref inputFile, ref confirmConversions, ref readOnly, ref missing,
        ref missing, ref missing, ref missing, ref missing,
        ref missing, ref missing, ref missing, ref visible,
        ref missing, ref missing, ref missing, ref missing);
    doc.Activate();
    Console.ReadKey();
}

word.Visible = true;