A good open-source dynamic proxy class library

I found a very good. NET Dynamic proxy class library from codeproject. A good feature is that it not only supports interface proxy, but also supports non-interface proxy. The key is open source. It is not clear whether Castle is open-source.
The following are my applications in transaction processing. Java code

1. Public ClassDbtransactionproxy: iinterceptor
2. {
3. Object target =Null;
6. PrivateDbtransactionproxy (object target)
7. {
8. This. Target = target;
9. }
11. Public StaticT newinstance <t> (object target)
12. {
13. Return NewProxyfactory (). createproxy <t> (NewDbtransactionproxy (target ));
14. }
16. # Region iinterceptor Member
18. Object iinterceptor. Intercept (invocationinfo info)
19. {
20. Object [] attrs = info. targetmethod. getcustomattributes (typeof (transactionattribute ),True);
21. Object ret =Null;
22. If(Attrs! =Null& Amp; attrs. Length & gt; 0)
23. {
24. Transactionattribute trans = (transactionattribute) attrs [0];
25. If(Trans. istransaction)
26. {
27. // Start Transaction Processing
28. Try
29. {
30. Sessinoutil. begintransaction (trans. connectionstring );
31. Ret = info. targetmethod. Invoke (target, info. Arguments );
32. Sessinoutil. committransaction (trans. connectionstring );
33. }
34. Catch(Exception ex)
35. {
36. Sessinoutil. rollbacktransaction (trans. connectionstring );
37. }
38. }
39. }
40. Else
41. {
42. Ret = info. targetmethod. Invoke (target, info. Arguments );
43. }
44. ReturnRET;
45. }
47. # Endregion
48. }

Public class dbtransactionproxy: iinterceptor {object target = NULL; private dbtransactionproxy (object target) {this.tar get = target;} public static t newinstance <t> (object target) {return New proxyfactory (). createproxy <t> (New dbtransactionproxy (target);} # region iinterceptor member object iinterceptor. intercept (invocationinfo info) {object [] attrs = info. targetmethod. getcustomattributes (typeof (Transactionattribute), true); object ret = NULL; If (attrs! = NULL & attrs. length> 0) {transactionattribute trans = (transactionattribute) attrs [0]; If (trans. istransaction) {// start transaction processing try {sessinoutil. begintransaction (trans. connectionstring); ret = info. targetmethod. invoke (target, info. arguments); sessinoutil. committransaction (trans. connectionstring);} catch (exception ex) {sessinoutil. rollbacktransaction (trans. connectionstring) ;}} else {ret = info. targetmethod. invoke (target, info. arguments);} return ret;} # endregion}

Similarly, applications such as AOP cache can be implemented.

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