facing problem while reading word file using c#

public string Test(string path)
    {
        Microsoft.Office.Interop.Word.Application wordApp = new Microsoft.Office.Interop.Word.Application();
        object file = path;
        object nullobj = System.Reflection.Missing.Value;

        Document doc = wordApp.Documents.Open(ref file, ref nullobj, ref nullobj,
                                               ref nullobj, ref nullobj, ref nullobj,
                                               ref nullobj, ref nullobj, ref nullobj,
                                               ref nullobj, ref nullobj, ref nullobj);

        string result = doc.Content.Text.Trim();
        doc.Close();
        return result;
    }

Error	2	No overload for method 'Open' takes '12' arguments
Error	3	No overload for method 'Close' takes '0' arguments