是的，. net二进制文件(EXE和DLL)可以很容易地反编译成接近源代码。检查. net Reflector工具。在任何。net二进制文件上尝试一下。最好的选择是混淆文件，它们仍然可以被。net Reflector反编译，但它们会造成一团不可读的混乱。我不认为好的混淆器是免费或廉价的。一个是Visual Studio附带的Dotfuscator社区版。

如果微软能想出一个解决方案，我们就不会有盗版的Windows版本，所以没有什么是非常安全的。下面是来自Stack Overflow的一些类似问题，您可以实现自己的保护方式。如果你正在发布不同的版本，那么你可以针对不同的版本采用不同的技术，这样当第一个版本被破解时，第二个版本就可以接管。

基于许可证管理c++应用程序的特性 使用license文件保护DLL文件 授权/保护软件?

net反应堆

更新

Jared指出de4dot声称能够反编译它。

.NET Reactor provides complete protection for your sensitive intellectual property by converting your .NET assemblies into unmanaged processes which cannot be understood as CIL, and which no existing tool can decompile. Hackers have no access to any intelligible form of your source. Powerful and flexible, the .NET Reactor licensing features allow you to enforce your license conditions and protect your revenue stream by using hardware and software locks. The license manager can build trial or permanent licenses, in a matter of seconds. A fully documented software development kit (SDK), complete with examples, allows you to call the licensing system directly from your code, allowing you to create custom extensions to the licensing system.

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)。

如果它是用。net编写并编译为CIL，则可以反映出来。如果安全性是一个问题，并且要避免混淆，那么我建议使用非托管语言编写应用程序，这种语言本质上更难以进行逆向工程。

只需编写一个好的应用程序和一个简单的保护系统。不管你选择什么保护，它都会被逆转……所以不要浪费太多时间/金钱。