stem.Linq;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Web;

namespace N
{
    public class RegularExpression
    {
        void Foo(RegexOptions options, TimeSpan matchTimeout, string input,
                 string replacement, MatchEvaluator evaluator)
        {
            // All the following instantiations are Sensitive.
            new System.Text.RegularExpressions.Regex("(a+)+");
            new System.Text.RegularExpressions.Regex("(a+)+", options);
      