是的。如果代码没有混淆，. net代码非常容易进行逆向工程。

混淆将给试图逆向工程您的软件的人增加一层烦恼。根据你得到的版本不同，你会得到不同程度的保护。

Visual Studio包括Dotfuscator的一个版本。因为它是一个捆绑版本，你肯定不会得到最强烈的混淆。如果您查看它们的特性列表，就会清楚地看到您遗漏了什么(以及应用程序将如何使您的代码更安全)。

还有其他一些免费或开源的。net混淆器(但我不能评论它们的质量或使用的各种方法):

Obfuscar 巴别塔。网上

最后，没有什么是完美的。如果有人真的想看看你的软件是如何工作的，他们会的。

广义上讲，有三种人。

Those who will not buy your software and resort to cracks, or if they don't find any, not use your software at all. Don't expect to make any money from this group. They rely either on their own skills or on crackers (who tend to prioritize their time depending on your useful and how big your audience is. The more useful, the sooner a crack will be available). The group of legitimate users who will buy (pay for) your software, irrespective of what protection mechanism you use. Don't make life hard for your legitimate users by using an elaborate protection mechanism since they are going to pay for it in any case. A complex protection mechanism can easily spoil the user experience and you don't want this happening to this group. Personally, I'd vote against any hardware solution, which adds to the cost of your software. A minority who will resort to "unethical" cracking and will only pay for your software because its features are protected by a licensing mechanism. You probably don't want to make it exceedingly easy for this group to circumvent your protection. However, all that effort you spend on protecting your software will pay back, depending on how big this group of people is. This entirely depends on the type of software you're building.

根据您所说的，如果您认为有足够多的少数人可以被推动购买您的软件，那么请继续执行某种形式的保护。考虑一下你能从这些少数人身上赚到多少钱，与你花在保护上的时间相比，或者你花在第三方保护API/工具上的钱。

如果您想实现自己的解决方案，那么使用公钥加密是防止容易被黑客攻击的好方法(与对称算法相反)。例如，您可以对您的许可证(序列号或许可证文件)进行数字签名。解决这个问题的唯一方法就是反编译、修改和重新编译代码(你可以使用Simucal回答中建议的技术来增加难度)。

只是补充一个警告:如果你打算使用混淆，检查一切仍然工作!混淆可能会改变类名和方法名。因此，如果你使用反射来调用某些方法和/或类(就像在插件架构中)，你的应用程序在混淆后可能会失败。另外，堆栈跟踪对于跟踪错误可能是无用的。

我认为这个话题主要有两个方面。

A) .NET只是反向工程而不是原生的吗?

B)我们是什么类型的程序员?

标题: 保护.NET代码不受逆向工程的影响

我的观点:

Least preference to make commercial application in .NET, because it will expose even your comments on the built binary after decompile. (I don't know what is the logic to include the comments also with binary) So any one can just decompile it, rename/modify/change the look and resell the application in 24 hours. In native application rename/modify/change of look is not possible as easy as one could do in .NET Worried part in .NET is that you could get the whole project with solution from a single binary exe/dll.

想象一下现在的安全状况有多糟糕。 因此，即使是外行也可以轻松地对. net应用程序进行逆向工程。

如果它是本地应用程序，如c++ /VB6/Delphi，只有知道ASM的专家破解者才能修补exe，而不是像。net那样100%逆向工程。

但是现在整个世界都在使用。net，因为用它的高级特性和库很容易做项目。

好消息是，微软似乎在2020年支持。net的本地输出，这将使像我这样的程序员考虑将。net c#作为主要语言。

https://www.codeproject.com/Articles/5262251/Generate-Native-Executable-from-NET-Core-3-1-Proje?msg=5755590#xx5755590xx

下面是一些。net混淆工具的详细对比表:

截图来自obfuscators.io

好吧，你不能完全保护你的产品不被破解，但你可以最大化/增强安全级别，让它有点难以被新手和中级破解者破解。

但请记住，没有什么是不可破解的，只有服务器端的软件受到了很好的保护，无法被破解。无论如何，为了增强应用程序中的安全级别，您可以执行一些简单的步骤来防止某些黑客“不是全部”破解您的应用程序。下面这些步骤会让你抓狂甚至绝望:

Obfuscate your source code, obviously this will make your source code look like a mess and unreadable. Trigger several random checking routines inside your application like every two hours, 24 hours, one day, week, etc. or maybe after every action the user take. Save your released application's MD5 checksum on your server and implement a routine that can check the current file MD5 checksum with the real one on you server side and make it randomly triggered. If the MD5 checksum has been changed that means this copy has been pirated. Now you can just block it or release an update to block it, etc. Try to make a routine that can check if some of your codes (functions, classes, or specific routines) are actually have been modified or altered or even removed. I call it (code integrity check). Use free unknown packers to pack your application. Or, if you have the money, go for commercial solutions such as Thamida or .NET Reactor. Those applications get updated regularly and once a cracker unpack your application, you can just get a new update from those companies and once you get the new update, you just pack your program and release a new update. Release updates regularly and force your customer to download the latest update. Finally make your application very cheap. Don't make it too expensive. Believe me, you will get more happy customers and crackers will just leave your application, because it isn't worth their time to crack a very cheap application.

这些只是防止新手和中级破解者破解应用程序的简单方法。如果您有更多保护应用程序的想法，请不要羞于实现它们。这只会让破解者的生活变得艰难，他们会感到沮丧，最终他们会离开你的应用程序，因为它不值得他们花费时间。

最后，你还需要考虑花时间编写一个好的、高质量的应用程序。不要把时间浪费在编写复杂的安全层上。如果一个优秀的破解者想要破解你的应用程序，无论你做什么，他/她都会做。

现在去实现一些玩具饼干…