dotnet-core/release-notes/5.0/netstandard2.1/5.0-preview5_System.Text.RegularExpressions.md

System.Text.RegularExpressions

 namespace System.Text.RegularExpressions {
-    public class GroupCollection : ICollection, ICollection<Group>, IEnumerable, IEnumerable<Group>, IList, IList<Group>, IReadOnlyCollection<Group>, IReadOnlyList<Group> {
+    public class GroupCollection : ICollection, ICollection<Group>, IEnumerable, IEnumerable<Group>, IEnumerable<KeyValuePair<string, Group>>, IList, IList<Group>, IReadOnlyCollection<Group>, IReadOnlyCollection<KeyValuePair<string, Group>>, IReadOnlyDictionary<string, Group>, IReadOnlyList<Group> {
+        public IEnumerable<string> Keys { get; }
+        public IEnumerable<Group> Values { get; }
+        public bool ContainsKey(string key);
+        IEnumerator<KeyValuePair<string, Group>> System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<System.String,System.Text.RegularExpressions.Group>>.GetEnumerator();
+        public bool TryGetValue(string key, out Group value);
     }
     public class Regex : ISerializable {
+        public static void CompileToAssembly(RegexCompilationInfo[] regexinfos, AssemblyName assemblyname);
+        public static void CompileToAssembly(RegexCompilationInfo[] regexinfos, AssemblyName assemblyname, CustomAttributeBuilder[] attributes);
+        public static void CompileToAssembly(RegexCompilationInfo[] regexinfos, AssemblyName assemblyname, CustomAttributeBuilder[] attributes, string resourceFile);
-        protected bool UseOptionR();
+        protected internal bool UseOptionR();
     }
+    public class RegexCompilationInfo {
+        public RegexCompilationInfo(string pattern, RegexOptions options, string name, string fullnamespace, bool ispublic);
+        public RegexCompilationInfo(string pattern, RegexOptions options, string name, string fullnamespace, bool ispublic, TimeSpan matchTimeout);
+        public bool IsPublic { get; set; }
+        public TimeSpan MatchTimeout { get; set; }
+        public string Name { get; set; }
+        public string Namespace { get; set; }
+        public RegexOptions Options { get; set; }
+        public string Pattern { get; set; }
+    }
     public class RegexMatchTimeoutException : TimeoutException, ISerializable {
-        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo si, StreamingContext context);
+        void System.Runtime.Serialization.ISerializable.GetObjectData(SerializationInfo info, StreamingContext context);
     }
 }