System.Text.RegularExpressions.RegexCompiler.RegexCompiler C# (CSharp) Method

        static RegexCompiler() {
           
            new ReflectionPermission(PermissionState.Unrestricted).Assert();
            try {
                // note some fields
                _textbegF       = RegexRunnerField("runtextbeg");
                _textendF       = RegexRunnerField("runtextend");
                _textstartF     = RegexRunnerField("runtextstart");
                _textposF       = RegexRunnerField("runtextpos");
                _textF          = RegexRunnerField("runtext");
                _trackposF      = RegexRunnerField("runtrackpos");
                _trackF         = RegexRunnerField("runtrack");
                _stackposF      = RegexRunnerField("runstackpos");
                _stackF         = RegexRunnerField("runstack");
                _trackcountF    = RegexRunnerField("runtrackcount");

                // note some methods
                _ensurestorageM = RegexRunnerMethod("EnsureStorage");
                _captureM       = RegexRunnerMethod("Capture");
                _transferM      = RegexRunnerMethod("TransferCapture");
                _uncaptureM     = RegexRunnerMethod("Uncapture");
                _ismatchedM     = RegexRunnerMethod("IsMatched");
                _matchlengthM   = RegexRunnerMethod("MatchLength");
                _matchindexM    = RegexRunnerMethod("MatchIndex");
                _isboundaryM    = RegexRunnerMethod("IsBoundary");
                _charInSetM     = RegexRunnerMethod("CharInClass");
                _isECMABoundaryM= RegexRunnerMethod("IsECMABoundary");
                _crawlposM      = RegexRunnerMethod("Crawlpos");

                _chartolowerM   = typeof(Char).GetMethod("ToLower", new Type[] {typeof(Char), typeof(CultureInfo)});
                _getcharM       = typeof(String).GetMethod("get_Chars", new Type[] {typeof(int)});
                _getCurrentCulture   = typeof(CultureInfo).GetMethod("get_CurrentCulture");
                _getInvariantCulture = typeof(CultureInfo).GetMethod("get_InvariantCulture");
                

#if DBG
                _dumpstateM     = RegexRunnerMethod("DumpState");
#endif
            }
            finally {
                CodeAccessPermission.RevertAssert();
            }
        }