Parsing the Querystring using Regular Expression

public static string GetParamValue(string query,string parameter)

{

string value = string.Empty;

Match match = Regex.Match(query, "[?&]" + parameter + "(?:=([^&]*))?", RegexOptions.IgnoreCase RegexOptions.Singleline);

if (match.Success)

value = match.Groups[1].Value;

return value;

}