I''ve post a question in other thread but I''d want the answers to be explained with more detail. So, I''ll put here what I''ve understood so anyone who wants can detail them. I also invite to anyone who has doubts about different technologies and terms to put them here so all of we can put our ideas in order: TERMS: MANAGED CODE: i was told is code that runs in a managed runtime environment. This runtime takes care of certain services, such as heap management, security checking, dynamic class loading and garbage collection. So I suposse that Java and C# is managed code, since it runs in a virtual machine that takes care of all of this... i am wrong? C#: is the same that objective-c? No relation. is similar in design to Java? The language design resembles Java, yes. However, it is far closer to C++ than Java is. what is better in it? Depends on who you ask However, many people think it corrected what they perceived as flaws in Java, as well as being a far simpler and more elegant language than C++. So I suposse that C# is simmilar to C++ but you cannot do certain things ''confussing'', I think there should be object references instead of pointers and many other things that I think make Java a great and clear languaje... i am wrong? does it have ''interfaces'' (which I think are great)? if so, i think I''ll move to C# because I love both C++ and Java and would be great a languaje with C++ sintax and Java ''way of programming''. VC++: can be used to produce both managed and unmanaged code. VC# can only target managed code, that will run under the .NET managed environment. Thanx. Add your own doubts if you want