Convert Querystring to Int

I need to receive a querystring, convert it to an integer and then pass it as a parameter to a stored procedure.  I have tried:

    ID = int.Parse(Request.QueryString["ID"]);
    int ID = int.Parse(Request.QueryString["ID"]);
    int ID = int.Parse(HttpContext.Current.Request.QueryString["ID"]);

In each case the application returns an error that the data type could not be converted.
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parse functions require string format.
sorry ToString();

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Perhaps the following would work:

 int ID = Convert.ToInt32(Request.QueryString.Get("ID"));
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cgcmqAuthor Commented:
I love it when the answer is so easy.

ID = int.Parse(Request.QueryString["ID"]).ToString();
Ashish PatelCommented:
as you are again converting the stuff back to ToString() just use

ID = Request.QueryString["ID"].ToString();
cgcmqAuthor Commented:
It drives me crazy.  I looked at 3 different references and non of them mentioned that.  

I think that I am going to go back to classic ASP before I lose my mind.

Thanks for the tip.
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