Counting a Phrase in a Text File

Function

        public int CountPhraseInFile(string strFileName, string strFindText)
        {
            int retValue = 0;
            StreamReader sr;
            try
            {
                sr = File.OpenText(strFileName);
                string strText = sr.ReadToEnd();
                string strReplace = strText.Replace(strFindText, "");
                int count = (strText.Length - strReplace.Length) / strFindText.Length;
                retValue =  count;
                sr.Close();
                sr.Dispose();
            }
            catch (Exception ex)
            {
                Response.Write(ex.Message);
            }
            return retValue;
        }

Response.Write(CountPhraseInFile(@"C:\downloads\test.txt", "type").ToString());