How to refactor these functions which have one line difference
<p>I have 3 functions where the only difference in is the values I point out with comment</p>

<pre><code>//-- point of difference
</code></pre>

<p>The majority of the function is the same across all three. The "DRY" factor is haunting my sleep :). I was wondering; can these could be merged easily and readably?</p>

<p>I have had situations like this before and I am hoping to learn something here.</p>

<pre><code>private string RenderRequestType(string render, NameValueCollection nvp, string prefix, string regexWild, string suffix)
{
    string regex = prefix + regexWild + suffix;

    MatchCollection matches = Regex.Matches(render, regex);

    foreach (Match match in matches)
    {
        foreach (Capture capture in match.Captures)
        {
            string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);

            //-- point of difference
            string value = nvp[name];

            render = render.Replace(capture.Value, value);
        }
    }

    return render;
}

private string RenderSessionType(string render, HttpContext httpContext, string prefix, string regexWild, string suffix)
{
    string regex = prefix + regexWild + suffix;

    MatchCollection matches = Regex.Matches(render, regex);

    foreach (Match match in matches)
    {
        foreach (Capture capture in match.Captures)
        {
            string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);

            //-- point of difference
            object session = httpContext.Session[name];
            string value = (session != null ? session.ToString() : "");

            render = render.Replace(capture.Value, value);
        }
    }

    return render;
}

private string RenderCookieType(string render, HttpContext httpContext, string prefix, string regexWild, string suffix)
{
    string regex = prefix + regexWild + suffix;

    MatchCollection matches = Regex.Matches(render, regex);

    foreach (Match match in matches)
    {
        foreach (Capture capture in match.Captures)
        {
            string name = capture.Value.Replace(prefix, "", StringComparison.CurrentCultureIgnoreCase).Replace(suffix, "", StringComparison.CurrentCultureIgnoreCase);

            //-- point of difference
            HttpCookie cookie = httpContext.Request.Cookies[name];
            string value = (cookie != null ? cookie.Value : "");

            render = render.Replace(capture.Value, value);
        }
    }

    return render;
}
</code></pre>
