Trying fetch data from word document?

i am trying fetch data from word document using

string Mainer(string pathfile)
        {
            Microsoft.Office.Interop.Word.Application word = new Microsoft.Office.Interop.Word.Application();

                object miss = System.Reflection.Missing.Value;
                object path = pathfile;
                object readOnly = true;
                Microsoft.Office.Interop.Word.Document docs = word.Documents.Open(ref path, ref miss, ref readOnly, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss, ref miss);
                string totaltext = "";
                for (int i = 0; i < docs.Paragraphs.Count; i++)
                {
                    totaltext += " \r\n " + docs.Paragraphs[i + 1].Range.Text.ToString();
                }

                docs.Close();   
                word.Quit();
                word = null;
                docs = null;
                GC.Collect(); 
                return totaltext;
        }

i get error The message filter indicated that the application is busy. (Exception from HRESULT: 0x8001010A (RPC_E_SERVERCALL_RETRYLATER)) i using this code in foreach any suggestion for this error ?