# System.Text.RegularExpressions

``` diff
 namespace System.Text.RegularExpressions {
+    public sealed class RegexGeneratorAttribute : Attribute {
+        public RegexGeneratorAttribute(string pattern);
+        public RegexGeneratorAttribute(string pattern, RegexOptions options);
+        public RegexGeneratorAttribute(string pattern, RegexOptions options, int matchTimeoutMilliseconds);
+        public int MatchTimeoutMilliseconds { get; }
+        public RegexOptions Options { get; }
+        public string Pattern { get; }
+    }
     public enum RegexOptions {
+        NonBacktracking = 1024,
     }
 }
```

